I am not aware of any issues with using third-party screening services. 

I'd check local STR FB groups and see if you have a local Real Estate Club.You can offer your services there, maybe for free in exchange for the experience.

.📜 Know the rules – No "deal-making" in the forums (that means no advertising, pitching services, or looking for partners).

I am passionate about helping fellow service members and veterans achieve homeownership. 

You can not go wrong with the product or the customer service they provide.

For many, it allows people to test the waters to see if they enjoy being a landlord. 

They should also be subject to federal stress testing.- Mortgage Rates and Government Support: If Fannie Mae and Freddie Mac were to operate without explicit government support, mortgage rates might increase due to higher perceived risk.

You can use your platform as landlord to advertise the service, but other than that it's not related.

And go to different services to find "Rent" (like the bigerpockets rent tool, or "rentometer") and property taxes? 

Look into a DSCR, Debt Service Coverage Ratio, loan where the rental income can be used to qualify the cash out refinance instead of your personal income.To Your Success!