It’s also a national average so if you want to get more specific I’ll attach a link to the federal housing finance agency page that keeps historical data that’s sorted by state and national levels.

I'm more knowledgeable of the north west Florida area (Panhandle), but I know that quality multifamily properties have been very rare around here.

An attached warehouse?

The house does have an attached side "casita" or studio type room that's on a separate electric and water line which has potential to generate income as well. 

IF the numbers can be verified, then there is obviously more value to a property that has a built-in income stream attached to it.

I invest in the panhandle of Florida (Navarre to Panama City) and looking into the Fort Myers/Naples area to diversify. 

It already has a separate room attached to the one car garage but there is no HVAC or water. 

If they have attached an actual reason to it such as a roof replacement or something similar, it is incredibly unlikely that you have any recourse. 

Florida panhandle is one of my favorite areas because if you get into an early development that 50-100k of instant equity with the price increases, Hold for 2 years as a long term and 1031 exchange into more new developments.

The bank doing the HELOC should have a Title company attached to it.