And if RE can feed my trading and pay my tuition I'm not far from Nurse Practitioner and Nurse Anesthesist will be right after so my income to inject here is only continuing in an upward trend.

I'm also considering the idea of a fix and flip for longer times per project but a nice cash injection YOY to use elsewhere and prove to banks I'm not dumb and I know what I'm doing.

Inject more capital, watch the return diminish and hold for the rest of my life to get it back?

Let’s call a duck a duck.Ironically/unintentionally, they have/are injecting resources in these low-income neighborhoods.

UC campus injects a lot of money into the area and being the newest UC campus, it is still in more in a growing phase than the long established campuses.good luck About that house as a buy and hold investment--I could have done that, and it would have worked out okay.

@Shlomo Rozen I've seen this type of "partnership" work, but most often do an ugly meltdown.Nobody wants to spend the time & effort to properly establish a formal partnership, with an LLC, Operating Agreement, etc.So, when negative cashflow requires the partners to inject their own capital - there's finger-pointing and a meltdown.Proceed with MAX caution...

If there ever is a decision to be made with a property you can have infighting with capital call injections, placing debt for loan or refi, when to sell, etc.

I think @Brian G. and @Jaycee Greene hit it on the head: an event occurring/debt resetting.When the debt forcefully resets on some of these assets, valuations drop if the submarket cap rate has expanded and/or if the operator can not show a good t-3, t-6 etc due to economic vacancy and rising opex (insurance, r&m etc).If the operator can't inject equity to cover the difference, then trouble arises.

Seems they could recharacterize their $2.9M from a loan to a capital injection to meet lender requirements, but instead they are 'asking' (threatening complete loss of your investment) for you to repay them. 

Great question—and it’s one that trips up a lot of people in the fix-and-flip space.To clarify: the $40k from your personal HELOC isn’t considered income or an expense on its own—it’s simply an owner contribution (a capital injection), not a business deduction.