A hotel is going to be tricky to offer advice for like the others here have said. When figuring out Wi-Fi coverage in a situation like that you'll need to consider things like wall materials, room size, bathroom placement (all those metal pipes
), etc. That's why it's best to have a consultant come out and test it. If you plan to do the testing yourself (which is fine if you want to) you'll want to order some different business-tier APs (Ubiquiti is always solid if you want a brand recommendation). Figure out the one that works best in your price range and return the rest. But you'll still be running wiring... and honestly, may as well make the people running the wiring figure out the best APs for that situation since the cost difference will be minimal, and you'll be assured that it was tested much more thoroughly beforehand.
This is one of my favorite quotes by John Ruskin, and it's always something to consider.
That aside - the desktop PC's we could probably offer advice on. You mentioned 7 PCs. Are these for customers to use, support staff, or some combination of the two?