You want to make sure that asset is secure.

I have close to 100 doors, thus I will pick up something even if it is barely cash flowing so that my other cash flowing assets can pay down the mortgage reasonably quick.

depends on your personal financial position and your goals.

There was some earlier advice to self-manage when under 10 units, and financially that makes sense if you want to run lean and do it yourself.

To Mike's point, it can also harm your ability to move on with a new partner who probably will not be thrilled to learn that you're still financially involved with your ex... 

We will not work with anyone who has not been to Milwaukee and spent at least a couple days with us, so we can get on the same page on asset and neighborhood quality. 

I also recommend you discuss this with your tax advisor.There are many other alternative asset classes to invest SDIRA funds into. 

Acquires a new one via capital injection annually, and with the pyramiding, after 20yrs of this will be siting on a nice holdings that is planned to fund kids university tuitions via rents at that time, which around yr17 we will start deploying into assets with more of that cash-flow focus. 

Assuming you have done those, understand the area and the demographic and hopefully have some idea of the financials for the property, then you need to underwrite the deal.  

Investing with personal funds creates a taxable event when you liquidate the asset.