When I search there are some commercial NNN properties which are around or over $1MM with corporate guaranteed leases for atleast 10 years and goes up to 20 years (like Fast food Restaurant chains, Banks, medical offices etc).

It's just that I'm anticipating a "better" tax situation next year - that is, for personal medical reasons in my family, I'm anticipating a lower level of income next year.

Are you sure it isn't medical? 

I want to know How does the earnings procedure work, How to close after doing the earnings, Do I need a attorney present if I’m selling cash only and How do I find out if the house have any prior liens on it...

Be it our job is tearing our family apart or we get medically separated. 

I've used the strategies others have mentioned with success:Ultrasonic repellant devices (spaced every 20' or so if you can)Bounce fabric softener sheetsSteel wool and/or expanding foam in every crack and crevice that makes sense.If your cleaners aren't arriving right away, you will need someone to do a "check out" procedure after guests leave, to make sure the trash is immediately taken out, and no food of any kind is present, wipe countertops, etc.

It must be done by qualified engineers or architects, CPAs are not qualified as they generally do not have knowledge of construction, construction techniques, design and estimation procedures.

Moreover, most of the people living in these areas drive 30 minutes per day to downtown Houston and Houston Medical Center.  

@Michael Joseph Allen II, why not get one of those little houses in the medical district or Heart of Lubbock that has a separate apartment on the lot.

A lot of the newer 4-Plex in areas such as the Medical Center come with higher Purchase prices compared to the Rental Income.