Some from savings or other income, and some from income produced from the property.

And, admittedly, selfish as this makes me, this also makes them a potential future resource for other things like brokers, lenders, investors that I might be able to tap into should the opportunity present itself, which is more important than whether they are another mass produced legal professional that knows where to obtain and cut and paste phrases from an online database so as to then bill me $350 / hour for their "expertise". 

I am wondering how many of you have turned your basements into income producing rentals?

I currently use top producer to track leads and showing time service for feedback.  

I've played with the numbers and it works as a house hack but it leaves a lot more wiggle room if we leave all 4 units producing.

All are currently rented and producing income.

They are a good option and will not need to be educated by you.Otherwise, you are going to need to push your plan provider to give you the support you need to utilize the plan they have produced for you.

Still producing positive cashflow.

It's always the same story: the cat unit, the gasifier, the coker, or some other major component of the refinery went down and they can't produce product. 

And he should--anything bought in the 2011 to 2014 time frame should have produced some pretty outstanding returns given that rent growth in many markets (especially TX where it appears some of his investments have been located) has outpaced even the best forecasts, and cap rate compression has boggled the mind of many.I know that all of the assets I acquired during that period performed enormously well, throwing off actual IRRs between 28.7% and 63.3% for hold periods ranging from 21 months to five years.Even assets acquired in the 2014-2016 era have, in many cases, performed beyond imagination.