Modular appears to be the future finally.

There are obstacles to splitting the lot into separate  town homes etc, so it appears having a quadruplex or Triplex will be the only option.  

Ask that person why this obvious criminal match did not appear in the background check that was supposedly performed.

The first applicant making requests is a big red flag, they could be very demanding and a huge PITA.The second appears to be a form of fraud but looks like you are renting to the daughter only.

It appears that the property is held within a partnership so the partnership would have to do the 1031 in this case(if you decide to go this route).If the property is sold outright - the gain(if any) is broken down into two components that is subject to depreciation recapture and that is subject to capital gain treatment.If the property is located in Florida and you are a Florida resident - you shouldn't be exposed to any state income tax upon sale.

I have already approached them about it and it appears they blocked my email.

Such title may be held by the entireties, jointly, or in common with others, and the exemption may be apportioned among such of the owners as reside thereon, as their respective interests appear.

Consider replacing the kitchen floor to match the adjoining room with the slate to make the entire space appear larger. 

As with anyone, read the fine print and ask what fees they not only charge you, but what they charge tenants for application fees, etc... sometimes companies shift costs to tenants (to appear cheaper to owners) and it only hurts the process.

As uncomfortable responding to what appears to be a fake profile, I'll say that you don't need a wet-ink copy to record a lien in the real property records - in Texas.