Different states have different rules yet it all up to what you negotiate for ... It is the Buyers responsibility to do their due diligence. Again, best to have someone represent you whether a real estate agent or attorney.
I am assuming you purchased the home at the trustee sale?? If was though bank and was listed on MLS the bank would have taken care of evicting the occupants. Not sure how this all works in FL -- Should be able to evict - to bad they will not take cash for keys --- what did you offer them?? Maybe you need to up that offer.
All HUD Homes are on MLS - MLS feeds into the Zillow site --
IN AZ - if you buy a home at Trustee sale then you owe any other liens against the home. Always best to confirm with title what recorded liens are before bidding. Have to do your homework. The Trustee's do not have nor search out any information to provide to buyers.
Mobile homes are considered vehicles to cant get a normal residential loan - Usually will have to get a loan from the owner of the home. Expect to pay far over the normal for interest rates on a residential home.
You could order a appraisal -- Or talk with local Real Estate agent --- they can send you comps and weed though what your house has vs the homes sold for estimate.
Talk to your Real Estate agent also -- they be able to explain and follow up with the lender.
In Orange County - the highest Grossing agent doesnt mean they know 1031 exchanges - Especially there were the home prices are extremely high --
Let hear your update
Have them show you how is listed on their MLS & the pricing History. They should be able to provide. Internet sites other then that of MLS are not always correct.