I’d Send them notification they are not complying with lease .

I do not give any more information.Every once in a while, I get an application that at first I might have to approve in order to comply with the law because, at first glance, on paper there is not a reasonable reason to deny.  

If you try to convince them that it's not a law, they will think you're lying.Even if it's not legally necessary to have, I'd add the wardrobe or armoire and, if questioned, then you tell the buyer that it "complies with the regulations" and move on.

The penalties for failure to comply if the safe harbor is revoked far outweigh the cost of compliance from the 1st transaction.

You call CPS when a child is in danger, you don’t threaten parents with this action and then decide not to call if they comply with your demands.

You should also build a file on your tenant(s) who don't comply with rules etc. with everything in writing for the legal end of things.

Sounds good on paper, though.Should tip you off that, even if you owned the note, you need a seller with standing to comply with terms if any short sale.

Then I rerent to a better tenant and raise the rent to boot if possible.Also, if it gets to the point of serving notices/eviction, hand it off to a service or an atty. it will ensure you comply with the laws and usually  scares folks into behaving. 

I'm sure this set up would appeal to some, but think it would appeal to most as a shorter term arrangement.Sounds like you have thoughts of egress, make sure the windows legally comply. 

Out of hundreds of tenants over the years I can only think of 4 that were trouble and about 10 or so that were difficult, but were trainable and complied with the requirements we'll say.