Yes, the involvement of your daughter is disturbing and totally not OK, I would tell the Mother (owner) that this behavior is unacceptable and if she is not sympathetic then don't worry about burning that bridge, it wasn't worth crossing.

Have it be a primary residence burn also be in decent shape and come out ahead long term if it ends up becoming an investment. 

I’d still advise not putting the additional money down, and burn a little cash each month.  

In October of last year when my home almost burned down in the wine country fires, I realized it was time for me to change my story and my relationship with money and my financial future.

I never done HML before, what is the best way to start out without getting burned?

Every single person I've encountered burns out quicker and we can derive no income from it.

My ears were burning!

Which is great if your on the correct path, however, if your wheels then are not pointed in the right direction you can crash and burn quicker too.

And then you have to prove it was the prior owners burned out couch and not some jerk from the neighborhood.

This allows me to see what properties produce Return to Senders and investigate that further without burning up too much of my marketing budget with more costly pieces like letters.