so a man opened up a bar
I don't have much real experience in the bar world but based on a little from restaurants, it's one of the toughest businesses out there. Real serious experience is a bare minimum, The short story is it's complex because you have both product, service, and real estate. You basically own or rent property, have huge startup costs including marketing dollars which aren't recoverable, you're working with food/bev that's perishable and variable every time (eg every drink you make could be good or bad), you're in the HR business and have to manage a team of staff, etc... and you can't leave for a second. As Ramsey puts it, either you RUN your business or it runs you. Ie if you miss anything it'll come back to bite you, so you need to know what you're doing and be merciless with the details.
no joke, I'd suggest watching a bunch of shows like Opening Soon, Ramsey's Kitchen Nightmares (the original UK version), the Opener (David Adgie) etc and reading books like Kitchen Confidential (Anthony Bourdain).