A coffee bar is one of the few parts of a house you use every single morning, half awake, with no patience at all for a bad layout. Most of them fail the same two ways. They land wherever there happened to be a free outlet, and then they accumulate. Six months on, the counter holds a stale bag, a chipped travel mug, a frother nobody has touched since February and a box of filters for a machine that left the house last year.
None of that needs a remodel to fix. It needs a decision about where the thing lives and some ruthlessness about what earns a spot on the surface.

Open shelving above the counter is the move that makes a coffee station read as part of the room rather than an appliance cluster.
Put it somewhere on purpose
The only two hard requirements are a flat surface and an outlet. Everything past that is a design decision, and it is worth making one instead of defaulting to whichever twelve inches of counter happened to be free.
A corner of the kitchen counter is the obvious answer and often the right one, particularly if it sits near the sink for water and away from the main cooking run so nobody is reaching across a hot pan for a mug. But a coffee bar does not have to live in the kitchen at all. The top of a credenza or a buffet in the dining room is a genuinely beautiful spot for one, and it has the advantage of being a piece of furniture you already chose deliberately. A cart against a wall is the renter's version and a good one, because the whole setup moves with you. A built-in nook tucked between the refrigerator and the pantry is the small remodel that pays back, if you are opening that wall anyway.
You can make a serious one work in about two feet of width. Space is rarely the constraint people think it is. If you are working with very little of it, the same logic applies here as in any tight, well-organized room: go vertical, and give every object a home.
The kit is shorter than you think
A brewer, a burr grinder, a scale, an airtight container for beans, mugs, and a surface to work on. A gooseneck kettle if you are doing pour-over. That is the whole list.
The brewer is the only place the budget really moves. A French press, an AeroPress or a pour-over setup costs a fraction of an espresso machine and gets you most of the way there in the cup. An espresso machine is a real commitment, and it is worth being honest with yourself about whether you want espresso or whether you want the look of a machine on your counter. Both are legitimate reasons to buy one. They are just different reasons.
Be ruthless about the counter
Daily things live out. Everything else goes behind a door. That is the entire organizing principle and almost nobody follows it.
On the surface: the brewer, the grinder, today's beans in something airtight, and four to six mugs. Not twenty. In a drawer or cabinet nearby: the scale, the spare filters, the frother, the cleaning tablets, the second brewing method you use on weekends, the backup mugs. Coffee grounds and milk make a mess, and every extra object on the counter is another thing to lift and wipe under at seven in the morning.
What makes it read as designed
The difference between a coffee bar that looks intentional and one that looks like a break room is almost entirely material and restraint.
Real ceramic mugs, handmade if you can find them, instead of the chunky branded ones from a conference. A wooden spoon rather than a metal one. Wood, brass or matte black somewhere in the arrangement to balance the visual weight of a stainless machine, which is otherwise the loudest object on the counter. One plant, a pothos or a snake plant, to soften an all-tile, all-counter surface. A linen towel on a hook. And negative space, which is the part everyone skips. A shelf with four beautiful things on it beats a shelf with eleven.
Light it properly, too. An undercabinet strip or a small picture light turns the zone into something you can actually see at six in the morning and makes the whole corner feel considered rather than utilitarian. If you are building a drinks station in the same house, the same rules apply there; I have written about the home bar version of this problem and it comes down to the same restraint.
A cart is the renter's answer, and often the better-looking one. Brass, wood or matte black keeps it from reading as utility shelving.
The beans are the upgrade that actually matters
A gorgeous setup with tired beans makes tired coffee. This is the least glamorous advice on the page and the only piece of it that reliably changes what is in the cup.
Buy whole beans with a roast date printed on the bag, not a best-by date, and use them within about a month of that date. Grind them yourself. A roaster like Boxwood Coffee ships recently roasted beans dated on the bag, and a subscription solves the real problem, which is that most people are quietly brewing something stale. Store the bag airtight, out of the sunlight, on the bar itself where you will actually reach for it.
Most of what makes a cup good comes down to four variables: fresh beans, a fresh grind, water at the right temperature and an accurate ratio. Get those and the machine matters far less than the internet would like you to believe.
The point of the whole thing
A coffee bar is a small piece of interior design that you touch every day before you have said a word to anyone. That is a rare thing in a house, and it is worth treating as a design decision rather than a pile of appliances that happened to end up in the same square foot. Give it a spot on purpose, keep the surface clear, put a few genuinely lovely objects on it, and buy better beans than you think you need. Houses should be lived in, and this is the corner you live in first every morning.