I have a clause in the lease stating that " Any notice to terminate this tenancy must comply with the applicable legislation of the State of Texas (the "Act")." and "a re-rent levy fee of $500 will be charged to the Tenant". 

As long as your applicant is approved through your housing authority to pay what you advertised your unit for and as long as you don’t broker a side deal after the HAP contract is signed for additional rent you are OK to proceed.

@Bradley GasparovichI would also add your stance on an applicant with a criminal record and previous evictions. 

I have no doubt @Carlo D. will be able to open the bank account he desires but when it comes so submitting loan applications the lender's underwriting team not only has to underwrite the property and review the borrowers PFS and personal information but also has to make sense of the ownership structure and who will be required to guarantee the loan.

I'm trying to understand the reasons....pros/cons.... to requiring occupants 19+ years or older to fill out application?

Perform the same task in each app to ensure a fair comparison.Load a property with pictures and details.Market that property.See what your marketing looks like from the public's perspective.Submit a fake application to see how easy the process is.Run a credit/screening report on yourself.Enter a maintenance request, assign a vendor, and attach a fake invoice.Enter charges to the tenant's ledger.Enter recurring charges and automatic late fees.Sign documents electronically.Run owner reports.After testing a few apps, one should clearly stand out.

I'd bet any local University has classes applicable to commercial RE investing and management, audit the course instead of attending for a grade, much cheaper

However* for Texas applicants specifically its required that the applicants address matches the address of the property they have listed on the application."

Personally the only thing I find awkward about it is that you have to "invite" people to fill out the application or pre-application by their email or phone, I'd rather have a link to apply that I could post on my listings rather than have people message me then I have to collect the email, then send them the application, but that's just a minor inconvenience for me.

It's built on top of G Suite so if you are using that it is really nice.ProsperWorkshttps://gsuite.google.com/marketplace/app/prosperw...G Suite in general has released a new tool called App Maker that allows you to build some really powerful applications on top of it.