I suspect they will kick their roommate in the butt if necessary to not screw up their living situation.I think I should have involved those roommates from the moment I only received 2/3 of the rent and reminded them that they all owe rent in full, and there are no "portions" of rent from my perspective. 

But without having read the agreement, I suspect it's not as tight as a lease.

That being said, I suspect it will be beneficial for the following reasons:1) If done properly, it can reduce your liability so that if one LLC is sued, the other is somewhat protected. 2) If you treat them like two individual businesses, it will be easier sell just one off in the future, should you choose to do so. 

Puerto Rico area Having been to Puerto Rico, I suspect there are not many zoning issues.  

I suspect most brokers will now allow you to wholesale while also working as an agent.

OP could potentially continue to overburden current septic system, but it’s failure (and it will fail at some point) could be very costly and eliminate some options   I suspect the ATU could be best solution at cost of near $20k (not sure of the cost variances in various markets).

I suspect that model was rejected by the market for good reasons.

I am not an attorney but suspect you’ll likely win in court.

Your insight on the economy is as I had suspected.

I suspect Martin Grizzaniti will have some more updated information for you.