I learned a lot from BP (the forums and blog articles).

“As long as an area’s economy is adding jobs and seeing rising wages, there will be demand for ownership housing.”Essentially, as long as people are employed with companies doing well enough to offer wages, they’ll feel confident enough to make that 30-year commitment to a sizable mortgage debt.This confidence is bolstered further by low employment numbers—as people are reassured that even if they lose their current job, there’s a high probability that they’ll find another one in short orderhttps://www.homelight.com/blog...

Again, the BiggerPockets store has some books for this or you can learn by watching podcasts, reading blogs, and interacting on the forum.

If they move out and you discover the smell, charge them for the cleaning and deodorizing.

But you can always listen to podcasts or read forums or blogs. 

We have a signed contract that the wholesaler don't want to move forward with because he discovered he can't double close and have to pay closing costs on two transactions, which eats into his profit.

We were about to get almost $20K off of the original asking price after we had an inspector come out, and discovered so incorrect info in the original listing relative to the size and offerings of the property.

Unless there's something I and everyone else isn't seeing there, I think we've discovered why we're not seeing this being offered in the market. 

The property was inspected before purchase and no made structural items were discovered.

Tons of actionable tips for you in that episode - https://www.biggerpockets.com/blog/biggerpockets-podcast-371-william-brownWith the stay at home order that we have going on here in CA, I think this is actually a great time for you to begin your RE education.