Given that its a matter of time before some or all of us will experience a late/missed rent, I wanted to go over the best strategy for dealing with tenants, that is reasonable, flexible, and allows for optimal rent collection.

Just comes down to having the right data and the right inputs.There is little doubt in my mind a sophisticated model like a neural network with the right inputs would crush Zillow's price estimate. 

Rent collection and bill payment for each property could all be done through your own property management account and software for tracking.

If that is the case, we collect any where from 1195 to 1395 per side on those style of duplexes. 

I collected on them like they were credit cards.

Landlords may find it much harder to collect rents and the yields from their portfolios are likely to fall.

Then you´ll hope that he or she runs a good business so you can collect your rent. 

paid 369k for my 4 plex in las vegas last year around this time . collect $3225/month with a 290k note at about $1886 a month pti .

Much more sophisticated business model.

If you don't refi with them then you refi someone else and now they are collecting 0% on you.