I recently started looking at LoopNet which seems like a great resource for Low to medium MFH and apartment buildings, have you used it before?

Besides the low rent she pays she is very demanding, pays late and is not taking good care of the property.

Repairs and maintenance costs have been pretty low.

I don't know your situation, but I know that if I can self manage, self repair, and keep costs low, anyone can.

So no, I wouldn't pay any of those low-interest notes off.

If you’re a millionaire liquidity is a small part of your investment strategy since the return is low.  

“The availability of affordable housing in Phoenix has plummeted very quickly and very dramatically,” said Maxine Becker, an attorney at the Wildfire Community Action Agency, a group that advocates for low-income residents of Arizona.Evictions are seen in virtually every community, from residents in their early 20s to retirees.

This either provides opportunities to invest in more real estate, rehab a property(s) or for personal use.You can also sell low performers to do the same.

I said around 200-250 and she replied that seemed low (which was quite discouraging)

In my opinion, this area is a melting pot, there is low income, high income, and short term rentals all mixed together. 10-15 years ago, I wouldn't have gone to this area alone to work, but it has gotten a lot better and I have never felt unsafe while working in this area alone.