Since no one is going to steal your deal, then you may want to reveal the city these properties are in so that someone who knows the area can lend their expertise.My questions are:Are rents in the area for similar homes 700-750 a month?

It may also be a good idea to see what the prevailing practice in the community is (this post is a good start).One thing to remember is that pet deposits can cover a wide variety of items, both inside and outside of the unit.

Currently, the family (Father in 80's, son is likely in his 60's and a daughter unknown age) has these properties in a variety of different names. 

Inside Baltimore County you have nearly a million people, and a variety of different income classes.The cap-rates in Baltimore County are some of the best in the country.

If you are looking for a variety of ways to do relatively passive investments you might want to check out my blog article Three Key Routes for Passive Real Estate Investing

Their credit check revealed a low credit score which I will accept with double the security deposit.

Not saying that will get you out of trouble but it will help as you're building your case if there is black mold. virtually every rehab homes has black mold in it.. .. we just spray it with Clorox and call it a day.. but I get it .. there are different kinds and I guess the wrong kind can make you sick.. boy you should see some of the homes we go into  IE hoarder homes they look like full blown petre dish's mold of every variety and they seem to be OK..

Is there a variety of employment?

Equifax filing reveals hack was somehow even worse than previous estimatesThe 2017 hack of Equifax, already among the largest ever recorded, just got bigger.Today’s information was filed with the Securities and Exchange Commission as part of the company’s disclosures regarding the hack.

Your path forward is dependent on what you value most, there is no single correct path.This might not be popular opinion but I prefer to pay only a little more than the minimums on debts and then save/invest as much as possible into a variety of things, rather than paying down debts and having nothing left.