I wouldn't buy through RtR again - I didn't realize that they're essentially an aggregation / marketing layer for a bunch of turnkey companies.

I got started by house hacking and it essentially eliminated our rent expense of $1000/month (or $12k/year), while also giving us experience managing a rental.

You have already made some great connections with @Shawn Holsapple this is a great site to build connections that are essential in the real estate market!

Essentially, they would be a co-applicant and co-Owner.

Essentially, slide the guest tub towards the door wall, into the space that used to be the water heater closet; build a new wall at the control end of the guest tub; build a new wall from that wall back to the original wall; install a bigger tub or shower pan in the master bath.The advantage here is that you only have to move the two ABS vents that are currently in that wall, and the PEX supply lines.  

Essentially all you would be doing is wholesaling at that point. 

On the other hand, if you look at this as a "lead selling business", they are essentially reselling the same lead to multiple people for what they charge.

Essentially the market here is less expensive and there is opportunity since the hurricane.

Simplicity, and essentially you're guaranteed no problems, because you only have to worry about the buyer, not others needing stuff. 

For example, if I purchase 24 months of $500/month payments, my guess is that industry standard is to agree that the party acquiring the partial interest would take a lump sum payment of $12,000 minus the amount already paid when the note is refinanced or the property sold -- essentially an acceleration clause of sorts.