Combining so many strategies into one syndication offering is rarely a great idea.

only you know (or should know) what the numbers are.Obviously the “cash flow” would go towards paying back the HELOC, so we wouldn’t see any of that income for a couple of years. and if you're just paying down the interest on the HELOC and not the principal, then the HELOC will still be due in its entirety after the draw period ends. make sure you are looking at this accurately.We just always hear about people getting started buying their first property, and even on a lot of the webinars we watch they run the numbers, get a couple hundred dollar cash flow deals and call them good. yes - in a lot of cases this is because (1) the assumptions are unrealistic, (2) the buyer bought when interest rates are a lot lower, (3) the buyer is spreading repairs, management and other costs other an entire portfolio and not a single property, (4) the buyer is managing themselves and doing all of the repairs themselves, or (5) some combination. 

I know legal ownership and beneficiaries can increase that coverage in a number of different combinations, but are there ways you can think of to expand coverage specifically with the solo 401k's?

My unit count is much less but the duration is around 50 years (combined my mom’s rentals and my rentals) without paying a tenant to leave or having to do an eviction.  

It was logical to combine this.

Have you considered combining "glamping" with cabin rentals for short-term rentals?

Lesson learned that location is always no.1 factor and quality of renovation is the momentum of it and those two the most profitable combination.

Combine these 2 and brown field is likely to set itself apart from the other local secondary airports. 

Everyone has a unique combination of skills and circumstances. 

Actually, the combination of all that you mentioned contributes to it.