The location determines all the long-term income characteristics.To narrow your search, I recommend eliminating locations unlikely to be good long-term investment locations using the following filters.

It can save you some time perhaps by eliminating properties, but there is nothing like seeing it.   

OP could potentially continue to overburden current septic system, but it’s failure (and it will fail at some point) could be very costly and eliminate some options   I suspect the ATU could be best solution at cost of near $20k (not sure of the cost variances in various markets).

Such portability with simultaneous security of tools eliminates the need to stay at the rehab property.

If the area you are staying in is expensive then house hacking is a great way for you to eliminate the cost of living for yourself. 

Hope that helpsLastly.. tou need directions where to go, not where not to go.A wise man once said, if you eliminate all the impossibilities, what you have left over are the possibilities.If you know what not to do, ... that's a huge part of the battle you have won!

Eliminating such risks boils down to the retirement of debt, totally or to a low level of exposure.

There are ways to hide what you've done, but no way to eliminate this risk.  

So eliminating or at least lowering your living expense and getting some rental income would be a great aid in that to make you feel more comfortable taking risks with your family involved.

That eliminates the need for a wholesaler on the sell-side for many.