Converting them into primary residences will really benefit you if you're going to hold forever.Another strategy our clients will pursue is sell those properties using 1031 exchanges and purchase passive instruments like NNN commercial properties or Delaware Statutory Trusts which will keep the depreciation recapture deferred. 

(I should add that I understand the stock market and other financial instruments quite well from a decade of investing there, yet we are 90% in real estate today) Financial advisors do not understand real estate, nor do they want to talk about it, because there is no commission in it for them.

With your background you know damn right well that private real estate syndications are unsuitable for the VAST majority of visitors to BiggerPockets.

MBS are instruments, they're not why the the GFC happened.

The short term investment instruments are always have the highest return, but they are the riskiest as well. 

One of the posters in group may be able to advise if it’s backed by a specific asset or what is the security instrument ?

If investor is focused mostly on promised return they could easily overlook the difference of these investment instruments. 

Focus on collateral first LTV, property condition, market rent, then the payor’s story and payment history; price yield to risk and prefer clear remedies with a recorded security instrument and servicer in place.

Can the owner in this case, deed equitable interest or some other legal instrument to allow myself to actually not only make repairs on the property but only pay the owner after the house is repaired and the house is actually sold?

Six days of controlled drying (dehumidifiers + airflow) brought readings down below 15%, preventing mold.A few quick lessons from the field:Act within 24–48 hours after a leak or flood.Use moisture meters or hygrometers—don’t rely on sight or touch.Track readings until materials reach normal levels (around 8–15% MC for wood).Keep gutters clear and sump pumps tested before storm season.Anyone else tracking drying data or using instruments after storms?