But it's closer to Brooks Air Force Base, so ~15 minutes away from the Valley Hi entrance to Lackland.

I'm sure this process varies by state, city etc. but figured I would take a crack at the forums to see what I could learn.I've found a SFH in the Myrtle Beach, SC area that has a "mother-in law" suite that has been built with a separate entrance, separate electric meter etc.

I have some water intrusion during heavy rain at the entrance of my English basement turned Airbnb in SE.

First upgrade security and have camera working or non working at every entrance and every corner of the building.

Last July, my fiancé, now wife bought a 2 flat that was advertised as a SFH and the zoning certificate says SFH, but it was built as a two flat. 4 entrances, 2 baths, 2 kitchens, 2 furnaces two 1960’s mailbox slots in the brick etc.

If it says SFR then you need to figure out what the requirements are to make deconvert to a duplex i.e, number entrances/exits, ceiling height, etc.It may be as easy as filing some paperwork, but you need to do some more research first. 

Every decision you make as to the next deal you do, should be based on the exit from that deal setting up the entrance to the next...which can only be established after you've designed your plan.

Entrances would be limited, and guests’ temperatures would be checked with noninvasive methods.

Recently,  numerous property listings I have walked in 5 points have either significant foundation issues or lots of standing water in the crawl space (one property we could not even get into the crawl space because of how deep the water was at the crawl space entrance!).  

I saw an ad for a 3-bedroom, 2 bathroom, with a basement that has a separate entrance for $4,300 a month for a 1-year lease.It had everything we were looking for, and it checked all of the boxes.