Start looking at properties now, pick a few locations and learn everythIng there is to know about the locations you chose.

To this point we've focused on X number of doors to get to a specific cash flow number in order for me to have the option of walking away from my W-2... specific challenges have just been*finding that sweet spot of property and location and getting the bad inherited tenants out *getting improvements done that needs to be done.

To locate the break or breaks in the sewer lines, plumber will snake a Camera down the line.

What locations in the US would you recommend to invest in for multi units that have (1) strong rental market (2) excellent cashflow?

fee simpleThe greatest possible interest a person can have in real estate.fee simple estateAn unconditional, unlimited estate of inheritance that represents the greatest estate and most extensive interest in land that can be enjoyed.

I think the basis of any due diligence is to source a top long standing PM or similar and getting them to advise you on the location. don't waste your money looking at cities you know nothing about.

If you have flexibility on a location there is almost always a home for sale for a similar price with a better assigned school (particularly now with the population aging/retiring and both parents of a child more likely to work).

@Conrad Metzenberg What was the most challenging part of the deal...from location to close? 

what would be the best way to approach for them to correct the fence location? 

If it is 2 to 4 units, besides the purchase price and the location, I would want to know the following:What are the current rents?