Depending on his involvement other than providing the cash you need and it will probably effect his profit split to do the deal. 

Then apply a mill rate, reduced to an effective mill rate, which is multiplied to assessed value.

The Houston ones would hopefully give me:a. positive cashflowb. enough equity that a 10% market correction would not effect me (if and when that happens)My primary residence was bought in 2011 at the low as a short sale with some robo signing agreement so I did not pay any closing costs.

We looked the house up on the county website and found that the owner is listed as a trust, different mailing address, and that the taxes have not been paid for the last 2 years.

My thought is that if there is a lease in effect, the new owner would not be able to raise the rent until the lease ends.

Of course I have his name and address (it's actually a business address) from the tax record and, of course, I've sent him mail.

Think of all the things that could go wrong and see if the lease addresses them: unauthorized pets or tenants, early termination, security deposit, lease violations, late rent, eviction, lawn maintenance, parking, etc.5.

Several more questions later I was ask for the address of the investment property. 

My gut tells me to send her a letter next month explaining the situation and propose a $200/month rent increase effective Jan 1st, 2019.

There was an obvious problem that was known that you did not address immediately.It is my hope that my direct response is taken as what it is meant to be.....helpful for your growth.