Thieves can easily cut through a lockbox to take the key, forcing you to change all your locks. 

Marketing being more valuable, but sales being the driving force of super success or average.So how does this apply to 80/20 (Pareto's law)?

With a home warranty you are forced to use vendors within their network and the process to get approval and repairs done can be agonizingly slow.  

Cash for keys, Offer him some money to leave before the sheriff force-ably removes him as long as he leaves the place empty and in good condition.I'd also try and be the squeaky wheel with the sheriff dept to try and get them their ASAP.

Nobody forces you to have an MA LLC for that if you dont do business there resp. you dont have to register as foreign (= out-of-state) LLC.

I wouldn't know as much as Roy, but would have a similar thought that it's probably a solid long term investment for someone who doesn't have a lot of time as it's turn key, but if you've got time to hustle you could likely do better by finding something in which you force some equity (by using the brrr strategy for example).

In one, I didn't want to be forced to rehab right away and tie up more cash, and nobody would consider renting the premises in the poor shape they were in.

If your home prices are in the $350k range...the majority of the labor force it attracts wont really much matter to real estate pricing.

To protect yourself in states where landlord can force compliance, bring in another copy of your current policy and have them provide a signed statement or sign a copy for you to keep. 

I don't mind a fixer upper especially if it means I can force appreciation.