Under the topic "Build, preserve, and retrofit more than two million homes and commercial buildings to address the affordable housing crisis" the text from FACT SHEET: The American Jobs Plan says: Eliminate exclusionary zoning and harmful land use policies.

No harm no foul yet, but be sure to stick to the lease.

If you are planning to use the cash long term, such as funding a down payment, then there is no harm in doing a cash out refinance. 

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....  

Don't do anything that will in the end cost you more money and place you in harms way.  

I’m new to this community, and I know there’s plenty of other people hearing all the buzz and wanting help getting started, but what harm could come from one more?

Honestly, I find a lot of those guys to be more like flashy click-bait than actual substance. 

But if you're just looking for practice, there's definitely no harm in looking in other towns and analyzing deals there.

Free yourself, like a gazelle from the hand of the hunter, like a bird from the snare of the fowler.Proverbs 11:15: Whoever puts up security for a stranger will surely suffer harm, but he who hates striking hands in pledge is secure.Proverbs 17:18: One who lacks sense gives a pledge and puts up security in the presence of his neighbor.Proverbs 22:26: Be not one of those who give pledges, who put up security for debts.These say 1) don't risk too much with loans requiring collateral and 2) don't get a loan with a sketchy dude because you're going to get caught holding the bag.Romans 13:8, too:  Owe no one anything, except to love each other, for the one who loves another has fulfilled the law.This warns against debt that incurs an outstanding obligation.

We don’t know any PMCs to recommend in the area mentioned, but since selecting the wrong PMC is usually more harmful than selecting a bad tenant, you might want to read our series about “How to Screen a PMC Better than a Tenant”:https://www.biggerpockets.com/member-blogs/3094/91877-how-to-screen-a-pmc-better-than-a-tenant-part-1-services-and-processesWe recommend you get management contracts from several PMCs and compare the services they cover and, more importantly, what they each DO NOT cover.