You can do both, not an either or, but focus on the one you like the mostRE and CRE are great if done carefully and methodically and with patience, but so is picking individual stocks. 

There is no 'per square foot' method that is accurate....At least until you have quite done a few.... 

Given your situation, one strategy that could work really well for you is the BRRRR method (Buy, Rehab, Rent, Refinance, Repeat). 

You need to set a deadline for them to correct the issue, then follow up with an inspection or other method to confirm compliance.

Quote from @Tracey Watler: Hello BP, I was looking for a lender in Puerto Rico, I’ve learned that even though Puerto Rico has almost all of the products and methods of the US not all US banks lend in PR. 

If LL uses accrual method, they can book revenue without receiving.  

Sorry for the questions just curious about your method since it seems different than most.  

Strategies like house hacking, the BRRRR method, and long-term rentals have worked well for me.

These properties can often be acquired through creative financing methods like:Seller Financing: Negotiate flexible terms with motivated sellers who want to avoid traditional bank processes.Lease Options/Subject-To Financing: Take over a seller’s mortgage without assuming full responsibility, especially for properties needing renovation.Creative Terms: Adjust terms to fit market conditions, like offering lower down payments or longer payoff periods.Staying connected with investors and tailoring deals to current conditions can help you secure opportunities even in challenging markets.

You can take a deep look at the deals and get an idea of the kind of variety you'll see and come up with your own due diligence method (that meets your unique situation).