Another good alternative would be Bonita Springs, just on the North side of Naples, or Cape Coral as I mentioned above

Alternatively you can do the LOC (line of credit) on it so you can retain the home but are definitely subject to today's current rate environment.

The properties are listed on MLS, the owner is a business connection from an alternate venture. 

Not when there are so many alternative methods of engagement towards resolve of which past clients have appreciated.

Does anybody have any advice on alternatives to resolve or get this fixed before I go all out & call a plumber.

You can do whatever you want in terms of bending for the tenants and trying to provide "great service,' but the truth is you receive no credit for it and will be the evil landlord at the first repair that takes too long, late fee owed, alternation denied, etc.  

I've read stories of investors who wired money, were told the fund was closed and offered a prom note alternative. 

Can anyone recommend a good alternative to Quest Trust Co, now known as Inspira?

The other alternative is to raise capital and be more of a fee developer, at least at the start.

Alternatively you may decide not to address the capex but be prepared to deal with high frequency maintenance requests with duct tape repairs.