I know the MB area pretty good, but dont recall where there is an A/B neighborhood that the homes are only $145k, especially a gated community. 

What class a b c or d.

Its none of the tenants business on how much you profit on them and will only breed resentment if you are making good $$ on the investment.Keep it vague...... market rent is X and my expenses on A/B/C go UP every year....not down.....so each year I keep rent static or drop it, my investment is going DOWN....and that's not a smart investment.

The house is in A/B neighbourhood wIth new appliances.

A,B,or C area) will cost me to build.2.

I live in a Boston suburb and plan to buy a property in this area in a B class area which I expect to run me 500k+.I plan to buy something that needs work and plan to have 10k set aside for renovation and 30k for a down payment as well as some reserves.

I personally would avoid that area since i'd prefer a B class and up neighborhood, with easier to manage properties. 

Is there a risk to the end buyer (C) when doing a double closing where they are using the end buyers (C) money to close on the A-B transaction?

Personally, I wouldn't rent a unit that doesn't have/allow a washer/dryer, and I assume most A/B/C+ tenants would be the same.

What is the criteria to distinguish the neighborhood as class A, B C or D.