Now new flooring is included in the rent? Where are you coming up with this stuff?
If you are working from open to close, you will kill yourself. Not that it cant be done but not suggested. You will need a break from the clients, let alone, time to fix things if they are broken. Very hard to relamp when you are working. Busy season is the time to have at least one person there as a bed cleaner.
Again, you DONT know your electric do you DONT KNOW if you need to add more amps or not. As Mike said, if you need more, it may not be just as easy as pulling from the spot next door. I was going to have to ad a new line from the drop point. Which meant, rip up the parking lot to run it in. Was quoted $50k for that.
Thye current beds wont get you much so dont count them as potential income if you sell them. THere are MANY used beds out on the market right now so you would be competing with them to get yours sold. Same as the housing market, price it low to move it.
NOW the good thing is that there are many used beds on the market! YOu can get a decend used bed for a fraction of the cost. But again, if you dont have the ac or electric to add it in, you are screwed.
IT HAS been proven that you need ac based on the amount of beds you have and the simple fact it is HOT HOT HOT, per your words. YOu are in a regulated state. Get the requirements from them on how cool the salon must be and also the interior of the rooms.