My question is mostly about the prospect of so-called "passive income", basically earning positive recurring revenue sources with little to know work done to maintain it.

. :)They usually have a couple of general business models: either smaller up-front-fee for the meter installation with a recurring fee for reading and billing, or a one-time charge for installation, and reading/billing is up to you.as already mentioned, it's actually illegal to sub-meter at a profit in some jurisdictions.

For the older folks If they don't have internet or email I have an "ACH permission form" and we set up a recurring transaction for them.

Like you said, extraordinary should not be recurring.

With enough capital going into the building to give it a face lift, take care of recurring maintenance issues and start with good tenants...

Part of what I am wondering about is the recurring business.

You will be better served to re establish your personal credit.In order to start rebuilding credit, the most pressing time-sensitive matter is to establish long-term open lines with good payment history as soon as possible.Open a secured credit card with a limit of 4x of a regularly recurring bill - cell phone, water bill, etc.

I'd like to be able to set up recurring payments, which is not a feature they currently have.Other solutions like Erentpayment, etc: Most other solutions I've found so far seem to be more spendy.

Did you just have to setup the recurring transaction, like Article # 111169, and was it good to go? 

b) How do you bill tenants for non-recurring charges?