Point being, the score is a very convenient, very quick reference of how responsible you've been GIVEN your established credit history.

That’s why we’ve leaned more into language like Nathan mentioned.

How convenient/easy is it to JV with others who are familiar w/ that area?

Easy access to all amenities and conveniences.

They all had good jobs ( engineer types)and liked being in a quiet convenient neighborhood vs an apt..

If you plan to buy more rentals you could lean more towards selling to free up some cash for a new endeavor.Personally, if I was in this situation I would, first look to refinance and pull some cash out to purchase a new investment.I'm also not quite sure if you are planning to buy another house to live in or what your plan is there... in the case that you need to find a new place to live, I would refinance and buy a new primary with a low down payment. 

They are going to have to have a need to sell there property quickly and conveniently at the sacrifice of a bit of there equity.   1) You can be very good at getting leads but if you can't close them then the  leads regardless of how many you have are of little use.  

Having their homeowners or rental property insurance in the same location as my loan statement and my property bank account is a level of convenience that has spoiled me. 

I remember my grandmother putting on siding on a two-story building while my grandfather (who was injured) was leaning out the window telling her what to do.

Hard to say because it's what you make of it, the systems you have in place, whether you plan for contingencies/have money in reserve, and the team you can lean on for advice and help (most important).