I know you are just looking for some ballpark figures here but it is really tough to quote any numbers with respect to market value for rentals. While the rental market is red hot right now, the condition and location will determine what you can expect for a monthly fee. Do yourself a favor and let a local Realtor make this very easy for you!
Is it easy to find a renter. Yes (depends on what rent your asking) the lower the rent the more tenants to choose from.
Rent of a 2 or 3 bedroom will depend on many factors as well........number 1,2,3 don't change, location, location, location and the next 2 don't change either, condition, condition.
It really depends on the condition of the rentals, how much you want down on them, location of the building and what is included.
Which building are you looking at?