There’s two components of household:1) the “who”2) the “how”“Who” is living together is easy: that’s the tenants.

Easy to transition this to a property manager, or even have multiple people run the account, than if the account is a personal account.

If she's willing, which it sounds like she is, your mother-in=law can get the line of credit with her property in her name and then you can just use the line. 

I also wouldnt let your mom go into 2nd position on an investment property with any sort of restructuring; it doenst sound like she's in a position to risk being wiped out.Overall, though, if you want cashflow on the new property but cant achieve that after a refi into a market rate loan, it probably makes more sense to just flip it, pay off your heloc and your mom, and use the remaining capital for the next deal.

20 townhomes sounds like it would be sales, but I don't like to assume. 

. $50k sounds like a lot to you but with the price of materials and of qualified labor, it does not go too far.

Probably an easy fix that might make a big difference.

Sounds like @Tom Wong & @Aaron Ward are doing it, I'd love to connect with all of you. 

Yes, they have some high fees but all and all such an easy process.

It may sound nice to pay a 6% management fee but the extra fees can add up to be more than the other company that charges 10% with no additional fees.