Assuming your offer got accepted, the owner would need to get a unit vacated by closing (obviously this will need to be communicated).

It's a real pain to enforce but it's worth it.The majority of carriers right now have a loss rule on new business that varies but goes something like this... they will not accept your new policy if you have a loss in the last 3 or 5 years.

If you told a seller, on an accepted deal.

You can test out mid term or short term rentals on one or a few of the units to offset that, or you can accept that you're drastically lowering your living expenses and building equity. 

Meanwhile, they form LLC's in preparation for when claims or conflict will arise almost as if there is an acceptance this will occur. 

If you don't have an appraisal and cannot rely on the county website then speaking with an appraiser sounds like your best option to get an accurate valuation.

If you are paying a fee for every property you make an offer on you are offering way too much...you should be making your offfers low enough (MLS) that only1 in 20-30 will be accepted.

You can also search on their websites to see if they post info.Watch 3 sales before you ever bid. 

One of my major screening criteria is you must have the deposit and first month's rent plus pet deposit within 48 hours of acceptance. 

Copy and paste the mailing address in google and once you see a homebuyer related website call the number let them know you find properties based off investor criteria and ask for acquisition manager.