If they do they can pull data for you and market analytics.Of course there is a lot more that goes into it once you get that data but based on your question - that is how I wouldProceed.

Prospective residents could be required to answer customized landlord questions while also needing to provide a valid credit card prior to entry.

What resources do I need to effectively screen tenants, how do I run their credit or criminal history?

The three pillars that qualify a DSCR loan, your credit score, loan to value, and the DSCR score ( gross rent / PITI(a)) - getting preapproved should be no problem as long as you have enough down payment, usually 20%, closing costs, and reserves. .

Of course, the calendar is only useful for the current time - reservations within the next 30 days. 

as  new home builder I can tell you that in many markets existing props are far cheaper to buy than trying to build from the ground up and of course you have far less drag on the money. so your location where you want to invest will dictate.. 

They would need to be at least a little more flexible and of course faster to differentiate themselves from the big lenders.

Or maybe have a squatter coming in on a down week and taking over.Or maybe you like dealing with folks sleeping in your back yard or having a derelict RV on the street in front of your house.I am being a bit hyperbolic of course, but our area isn't owner friendly at all and it is getting worse.

My credit score is really good and I have around $450000 mortgage  on 2.75  rate for 18 more years.Thank youN.

You typically need 20% for the down payment and there are some credit score requirements as well.