Is it just not my worry what their income is since the voucher covers the rent, or is my concern that if they only have about $950/month then they won’t properly be able to maintain their pets and their standard of living valid?

But many travel med profs travel as a couple, with their families, with a pet(s), and they want or need extra space to spread out.

I pay all utilities and make them pet friendly.  

Took one booking, the tenants broke contract by bringing a pet (dog hair and a bone were left behind), and Landing was not exactly pleasant to deal with in recouping security for extra cleaning and damages (dog used the ceiling fan remote as a chew toy). 

Move to duplexes and you learn you need to pick compatible tenants to avoid becoming a mediator in disputes about noise, pets and parking.   

Check for unauthorized occupants and pets?

I do have some pet peeves but I have learned to work around most of them.

There are several types of fees on Airbnb specifically: -Airbnb service fee, cleaning fee, extra guest fee, pet fee, security deposit, VAT (if applicable), and local taxes. 

Consider 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.

I usually use agents, but in that market, it was not worth it as the agent did not do much in the previous year saying he had 3 inquiries and they all had pets when I was no pets.