What source do you use for:- screening criminal background- how much they make- any step by step that would be good to get them in. 

Are maintenance and tenant screening included?

I will screen and background them as I do all new tenants but looking for some advice as to whether it is advisable to add a non-financially responsible tenant to the lease.

House hacking is the most powerful way to get started in real estate investing, and it sets you up for success because you learn so many things: dealing with contractors, how to screen tenants, lease negotiation, but most importantly, your goal should be to reduce or eliminate your housing cost, and there are a lot of ways to do with house hacking depending on your flexibility with strategy: rent by room, Section 8, mid-term rental, STR, etc, and you can combine multiple strategies too. 

Go to BUILD YOUR TEAM at the top of your screen, and you can search for other MEMBERS or LOCAL MEETUPS.

Though the tenant did report the app was difficult to use, especially from a phone.

.: Hi Shawn, I use KeyCheck's lease agreement (and lease addendum, as needed), and background screenings.

Now it's two weeks later and they are not returning emails or phone calls.  

They're seldom home during the day and on weekends.The upstairs tenant texted me yesterday (I do have a separate phone line for our properties) saying she's having noise issues with the downstairs tenants: banging the screen door closed after she's gone to sleep on weeknights (11:00pm), talking on the phone at 1:30am, up and about at 2:30am on the weekend.

Any thoughts or experience using RentRedi for distributing listings and tenant screening?