But if the contractor doesn't have a completely clean record, I wouldn't take on that risk and give up a large portion of your profits. 

In such cases, the local fire marshalls may have authority. some jurisidictions require tanks to be cleaned out and filled with sand or other inert substance. some require sampling. you can check with the local fire marshall without identifying the house.Again, you should find out why the tank is not used. if its because the seller no longer occupies the house, then the tank may still be able to be used. sometimes, owners decide to put a tank in the basement. you should find out if it is truly an abandoned tank or just temporarily inactive because the seller is not using the house....  

Leverage 75% LTV, buy $2M in multi-family class B/C needing lipstick to max the rents, stabilize for one year of clean operating expenses, cash-out refi, wash, rinse, repeat.

Especially considering managing the listings, bookings, supplies, cleaning, etc. 

The numbers they reported for 2019 are healthy and the owners have not been reported numbers 2020.

He had a clean credit and background check, although he didn't actually have much credit, but his score was 700+.

We have such a healthy market normally and thats on top of the crazy influx of investors this year.I started with MLS, picked up 2 off auction, and now will probably be spending most of my time with off-market deals.My future goals are to connect with a multifamily broker to acquire some 2-4 unit rehabs. 

How will you handle turnover inspections and cleaning?

I purchased a brick home foreclosure and have just cleaned it out and gutted the inside of it (it needed it).

If that's the case, you can't do any renovations until you have it professionally deleaded or it would be flagged for Unauthorized Deleading and you can get fined and the property would never be able to get a Lead Certificate, only a letter of Environmental Protection that states you did illegal work, got caught, then had to pay a professional to clean up the mess.