For another, they were selected to fit your space. 

But there's more than one right way to do it depending on what your "unfair advantage" is (per @Brandon Turner) and your investing time horizon and your ideal day-to-day setup.

He's an ideal tenant with credit above 750, well above our income requirements, and has a clean background with no evictions/felonies/etc.

Ideally would be doubling the amount of units and adding some boat/camper storage.

Ideally I would like to eventually get into using portfolio lenders, so a bank/credit union that does that is a bonus. 

I guess I'm thinking in terms of being able to drive to the property if necessary,up to 2 hrs would be ideal, but not opposed to 4.

I have no right to pitch a fit about one!!"   

My ideal markets are Nashua, Manchester, Concord (and surrounding), Milford, Merrimack, Hudson, Derry, Londonderry, Hooksett, and northern parts of MA. 

I really need to establish relationships with some people with cash who could loan me money with flexible terms and ideally around 6%. 

Ideally we will purchase a home with a basement entrance and create our downstairs apartment. most houses we are looking at that have this availability for our large family and to accommodate a one-bedroom apartment are in the 400s.