Dont let it bother you too much.

NO - the housing authority are paying most of their rent but they pay a portion as well. so that begs the question what is bothering you then ?? 

This way you can market it at any time online without bothering the tenant with frivolous showings.By combining these two things, when we receive notice for a mid-month move out, we let the tenant know that they are obligated for the full last month, but we will start marketing the property earlier and if we place a tenant before the end of the month, we will refund their prorated rent.It works well for everyone.

Really, most tenants worry about bothering me and don't always call me as promptly as I'd like.

I just figured out the obscene margin that he is making (which doesn't necessarily bother me), and it begs the question why is the seller taking such a hit on equity?

I'll give a few examples of each of the numbered items above, but there are many others:1) If your net worth is less than $10,000 and/or you make less than $40,000 per year income, most attorneys won't bother suing you personally. 

If he was a wastrel, don't bother with him: He'll be radioactive for at least 7 full years.

Most tenants have no clue about toilets and unless it's an outright issue, they don't want to bother the landlord with a running toilet.

I'm a big believer in leveraging debt to buy more, but it sounds like the debts bother you, and it would do a lot for your mental well-being to get them off the books. 

If you do this wrong and your tenant surprises you with a brain, he could cause a lot more grief than the little things that bother you now.