You can believe my experience or ignore it and let them in.

It sounds like the flags were raised but for whatever reason, you chose to ignore them.I would be careful of money hungry attorneys who would take your case just to get more money out of you.

Your partner feels it’s more beneficial to himself to put you on “ignore” and has no moral or ethical qualms about such2.

Ignorance of lead paint presence doesn’t exempt you—you must have a compliance letter to avoid strict liability.If you rent to a couple or a single woman and she becomes pregnant, the law requires you to delead the unit.

I have noticed that many flippers in my area have taken courses from the various gurus but otherwise are blissfully ignorant to understanding rehab costs.

Just add the late fee to the principal balance owed if the borrower ignores paying it.  

Somehow, your ignorance of how anything works is proof that it doesn't work? 

You need to really understand the risks and align yourself with smart people/teams that aren't just looking to take advantage of your ignorance.

I agree with 100% with @Clayton SilvaA general tip: Spend time on income producing activities and ignore most of the rest. 

@Clayton Silva I hear you. to many investors focus on the cheapest price and ignore the big picture.