@Jordan Moorhead I do not own properties in that area but the most profitable are small apartments like 2/1, 1/1 or studios since are cheap in comparison with bigger apartments or condos.

Pre-qualificationIf you are too "Poor" to buy what you want in a neighborhood you are comfortable in, look at 1st time housing grants to increase your down payment amount so you can buy more house.The amount of the loan, and the amount of your down payment + grant will dictate a particular MAX purchase price for you.Be sure to allow for closing cost and loan costs in your calculations.Once you have that MAX dollar amount you can spend start looking at what you can afford in different neighborhoods.For instance in some cities you might find a Class D neighborhood 4 plex in good shape for the same price as a Class B neighborhood duplex.The Class D place might give you more cash flow than the Class B too, [BUT]Maybe your chance of getting robbed or shot or carjacked in the Class D neighborhood might be greater than the Class B neighborhood (so factor things like that in too).The question is still which should you buy--First whittle it down to specific properties the Bank will let you Afford--then make an apples to Oranges comparison as best you can.

Get another quote for comparison.

Correct, generally once you receive a good estimate by doing recent sale comparisons in the area of your existing property.

But actually, that's not even the right comparison, because with my plan she keeps the Compton house.

They dont need this much data, but instead comparisons similar to what the various local realtors post when someone is trying to pick (for example) dayton, columbus or cleveland. 

The apples to apples comparison thing is particularly important when you then consider that whatever market you choose to pursue is going to have differing definitions of what the market will bear for a "good investment".

The income value will be different than the sales comparison approach.

LTV is "loan to value" which is a ratio referring to the financed portion in comparison to the property's worth.Again, just a friendly FYI.

If the listing looks very poor in comparison to what's on the market, then I would have a conversation with your agent.