The lender will want to see that the income generated by the property can cover the monthly principal, interest, taxes, insurance and HOA (if applicable).

Screen applications?

Next applicant...

Cash flow may not be positive after accounting for other expenses like your annual property taxes, insurance, and mortgage payments if applicable.

I am looking to get something like a Termidor application done.

I recommend your purchase agreement include an opportunity to review any lease agreement, payment history, and application screening for current occupants.

I specifically need really user friendly accounting features (including ability to sync with quickbooks and print checks directly from the site/software), customizable online application, and online rent-pay as an option (hopefully with free or very cheap ACH). 

Most are actually pretty helpful if you reach out and ask questions in advance vs being hostile when they make you jump through hoops completing applications and preparing for the P&Z hearing.

Is your DSCR ratio greater than 1-meaning are you cash flowing (according to the lender's criteria of mortgage, property taxes and insurance (and HOA) if applicable).

There are way to many PM's not getting properties rented and they are staying vacant, there is also way to many rentals being rented less than market rent to get a "quick tenant" causing investors to lose money, you will also need that PM to be completely productive and quick to the applicants and also not trying to incentivize off of your property needing repairs.