That's enough cash to float the mortgage for 4 years without ever collecting a dime in rent.Yes, there is a growing trend that sub2 is a way to get into real estate with no money. 

I was wondering what is the best way to collect rent going forward.

Depending upon your credit and the asset location, you can get to 90% of the purchase price + 100% of the rehab costs, so long as that collective amount does not exceed 75% of the ARV.

Basically I have virtually 100% rate of collecting every dollar tenants have owed.Good luck

@John K.again - the point of a house hack isn't to cash flow.say you can rent for $2000, or you can house hack, and when you house hack, your mortgage is $5000, but you collect $3100 in rent.you still house hack. 

The other very old school option is to just knock on doors, my first apartment appraisal thats how I collected rental data on competing complexes.

The sales and onboarding team (the team who collects your documents) are good, however, after they pass you to the actual property manager, it was very bad experience for me.

If I hired a PM that would also take care of collections (among other things) would I still need a service like rent redi?

I did better than collecting rent. 

The rest have a combined worth of about 1.5 million but aren’t owned free and clear yet.All Properties are collecting rent and generate about $16,500 (profit) a month in Cash flow after mortgages/expenses.