Wife came from immigrant family, living in a one room rental with five adults.

In short, you also want: -detailed credit report and history for all proposed adult applicants-pay stubs-bank statements..in addition to the other things you and others have noted. 

What client base do you serve (students, adults with disabilities, seniors, etc.)?

New Braunfels:short term rentals are not allowed in any residential zoning districts​a special use permit must be obtained for all properties located in non-residential zoning districts, except those located in the following zoning districts: C-4, C-4A, and C-4Bshort-term rentals are not allowed in the floodwayannual life safety inspections are required​maximum occupancy of two adults per sleeping area, plus an additional four adults​a minimum of one off-street parking space, not including the garage, must be provided per sleeping areavisit the city of New Braunfel’s website for more informationPoint Venture:permit requiredowners must provide guests with important operation information such as emergency contacts, location of water shut off, parking requirements, trash collection, etc.view the complete STR ordinance for Point VentureRollingwood: STRs prohibited no rentals less than 30 daysRound Rock: no restrictions on STRsSan Marcos:Home Share Rental Registration required​Proof that the premises is the primary residence of the applicant, including at least two of the following: motor vehicle registration, driver's license, Texas State Identification card, voter registration, tax documents, or utility billOnly permits one STR/owner in city limitsOccupancy limitsRequired safety featuresLink to more detailsSunset Valley: no restrictions on STRs​​Spicewood: no restrictions on STRs​The Hills:no restrictions on STRs​There are extensive HOA rules you must follow.

Where you have adult children assisting in your RE ventures, someone like say, myself, has younger children which consume more then they produce.

@Carlos Alvarez"Adult Diapers"It Depends. 

Some people travel with their personal collection of XXX movies and adult toys and watch them with their spouse. 

But if housing is going to be treated like an employment search, it’s time to look at giving adults who can or cannot work a pathway to homeownership.

If I am taking a family trip with my two kids and in-laws (6 people total, 4 adults and 2 kids), I want at least 4 bed and 3 baths.  

FDIC estimates 10 million adults are unbanked...