What is the $10K for? He's either trying to make rent if he owns the place or save from paying rent. If he's just trying to profit off of a cheap lease deal that he has, see what the real market rent is, and do a net present value calculation of the savings over the number of years at a rate of return of say 6% or whatever you can borrow money at (if you need it). That is all you should be paying if you want to be in that business, or I should say, hobby. There are lots of used record shops near me and covid has killed them.One also sells inexpensive turntables and sells a good amount of $4-500 ones to people just getting into or back into vinyl. I think on-line is the way to go, and if you rate good used ones properly, you should make money there. Brick and mortar, I doubt, especially if you need to hire an employees.