Can someone still obtain a realtor's license in Texas  with having a  misdemeanor domestic assault charge on the record and the offense  occurred  almost 15 years ago ?

Coffee is going to over personalize a situation where a person is MOST likely to use personal emotions against you.Late rent needs to be dealt with firm, fair, and expediently.

Lender-paid PMI (or LPMI) is a thing, and PMI doesn't have to paid monthly.So I would get a Loan Estimate from the lender, ask about points and origination charges, find out of PMI is being paid in lump sum, and that might be the key to why it seems like such a good deal on the surface.

Imagine buying a 1M property with all cash and charging 3K per month in rent. 

Check your local laws, but in many cases if you (owner) is the one doing the cleaning, you can't charge for your time. 

The only way to really know is to just run every single property through these things to see what they're going to charge you.

They usually charge a monthly/annual fee, but it's usually easily worth the price.

They specialize in working with real estate investors, charge by the month, and I find them very cost competitive.

It may sound nice to pay a 5% management fee but the extra fees can add up to be more than the other company that charges 10% with no add-on fees.

Still, real estate is different in that shelter is a necessity (versus say me selling pies, if I charge too much you can always buy cakes instead), which means that invariably government will be motivated to get involved.