How much could a car make on Turo rented out full time if you don’t mind me asking?

On the flip side, most things that bring people into the city have been cancelled indefinitely (sports, conventions, school, etc).

The MIL will work fine if you plan to live in one of the units indefinitely, but may pose a problem if you move out and want to rent "both units" of the home.Most of the properties on the MLS with existing basement units are either MIL's or completely un-permitted (akanot legal) dwelling units. 

This is actually a problem - since now you are treating them as one activity, they will carry forward indefinitely. 

Do you think this is a good strategy for me to implement as well, since I am currently paying 3k/month in rent and essentially receiving no added benefit/equity/appreciation for this, or are you suggesting I continue renting indefinitely while I am in the Bay Area and begin my real estate portfolio through OOS investing in a market like Columbus?

When we discussed the term of the lease I told her that it was for an indefinite period, hence the low rent. 

I can see where a PM might view this badly if part of the deal with you helping to find a tenant was that the tenant had to keep paying you indefinitely.

I have friends still paying off their student loans, moving back in with their folks indefinitely, and working at Chipotle.

You don't have renters that are living in the car making the payments on the loan, you are. 

@Justin Dyer what neighborhood were you looking in?