I will say that it's harder to set up your own system... so make sure you partner with someone who has done that before who can help for the first time or two so you know what pitfalls to look out for and learn how to pick the right market, set up your team and properly set up your systems (team being the most critical part). 

From what I understand of most HOA's, I'm responsible for the interior and the HOA is responsible for the exterior/common areas.

One thing that may help is a common goal that excites her.

This is a very common loan product offered by pretty much all mortgage lenders/brokers. 

Is it common for property management company to include “owner cannot have any contact with tenant during the lease term” as per of standard contract language?

Hyper local as said, but it would be highly unusual not to be able to rent the whole house and pretty common only to allow the ADU rental when owner occupied.

It is common in flooring installers to get cancer from old floor demolition of tile that had asbestos.

What the article points out is: Piercings are COMMON "Record KeepingGood record keeping is both important and required.

Phony landlord references are common but I've gotten good at sniffing those out.

Do you think this was a misleading tactic used by the seller, or is this a common way that rental income is reported?