For instance, if I buy a house 20% down, 5% closing prep costs where the rent matches the mortgage, interest and tax and assume a 5% rent growth and appreciation, I'm expecting an 11% total return which is just not good enough for the hassle involved. 

It was a several million dollar commercial deal that was going sideways before we got involved and steadied the ship.

Your overall experience investing in a syndication involves much more than the yield you could achieve.

It's important that anyone reading your claims about BAM understand the risks involved in these investments and that it's possible if they send money in they will never get it back out.

or perhaps a reverse build to suit where the data center operator controls the buildout and the planning etc.I've not been involved in a data center first hand but the central OH market is pretty data and warehouse heavy as far as developments go and to echo the posts here, the power requirements are wild, and the red tape to get that power to the site is often cumbersome. 

@Chris May,You're really whipping a dead horse.The whole principle behind mortgage acceleration involves paying the principle off faster.How it is done is irrelevant.

My goal is to understand the current demand and rental potential for ADUs in this part of the city, as well as the costs involved in building.

I also got involved with a builder in Florida who has yet to produce the first of three houses they're contracted to build, which was a major hit to my available funds as well, setting me further behind.I also figured if I fell a little behind in saving (18 months instead of 12 months for example), I'd still be making progress.

What financing options are available when partnering with a solo 401(k)? Can you use conventional loans, or does the loan need to be non-recourse?

Might be a little bit confused here, but from what it sounds like you were involved in purchasing the property, renovating it and then selling it?