I have been in another syndication where they had a deal go south but the GP's decided to fund the entire remaining capital they needed and eventually turned the deal around for a profit.

Truth is low grade properties are not profitable unless you self manage and get work done for below market rates.

I do this for profit.

As to your points about other methods such as 'investing in a private syndication' or the like imagine this; you can invest say 500K cash and make a 500K return over 5 years that you now owe say 200K in taxes on leaving you with 300K profit - *or* you could invest 500K from your ROTH IRA or SOLO, make a 500K return and owe NO taxes and net 500K profit - a 66% better return.

Some potential downsides include giving up more profit and possible disagreements on project decisions.

Keep that 1st house hack and buy another primary residence (SFH) or sell 1st house hack and use some of those profits for primary/another investment?

Hi Sylvia,I’m seeing vacant lots within HOAs like The Hideout, Indian Rocks, and Lake Wallenpaupack estates that have high margins and researching the area, I found at least a couple similar lots in the same area selling for %200 profit on the low side. 

It falls apart completely if you think of yourself as as tenant and pay yourself rent (that you would otherwise be paying someone else).https://www.richdad.com/your-house-is-not-an-assetI prefer the quote from The Richest Man in Babylon, "Make of thy dwelling a profitable investment." 

A broader market demand can lead to faster sales and potentially higher profits when it's time to exit the investment.#6 Lower Maintenance Costs:In comparison to small multifamily properties, single-family homes with ADUs often have lower maintenance and repair costs.

There simply may not be enough "meat on the bone" to make a profit commensurate with the hassle and stress.