Volume shot up from near non-existent.  

If you have an existing FHA loan and go to apply for another one the lender will know immediately that you already have a FHA loan and will require you to refinance the current FHA loan or pay it off. 

Like John says it depends on your market. 65-70% of ARV is ideal but in some markets it doesn't exactly exist and in others people will tell you they buy even lower than that.

Maybe first off, check your existing portfolio to see which property already has the most equity and/or worst rent return ratio, and flip THAT one?

A hotel can exist without those amenities and not all hotels even have them. 

If you need to, pledge the existing property, wait for a better price, then sell. 

I had my roofer inspect the joists to make sure it was solid when the roof was changed, infact it was them whom suggested I use the existing framing to save some bucks.

Therefore, there really is no way of me knowing if these repairs are actually happening or even if these repairs/work orders actually exist!

For the short(er) run, you can remove the tile and lay heavy plywood (3/4" or 1") on top of the existing sub floor - and shim to level.

If the market is hot, I would rent at market, if it is saturated I would probably go a hair lower to get a better crop of applicants.