This could be either cash from their SDIRA or their cash on hand.2) Having a non disqualified person join as a partner who would use a loan of their choosing outside of an IRA to be a 50% stake holder.3) IF I could find someone that would sell on a Land Contract that would not require a 'personal guarantee', could my SDIRA do say a 50% (or less if possible) down payment and have them carry the remainder on the LC?

I'd definitely be interested in being a stakeholder.

However, it could just as easily be acquired through a contribution of new capital by stakeholders (shareowners).

Interesting though, it seems unfortunate in situations where the lien holder is acting on behalf of the investor(s), whether it be themselves or other stakeholders like fixed income pensioners who could really benefit by recouping more principle from a higher, all cash no contingency offer, why they wouldn't insist on seeing subsequent offers prior to making their decision to accept/decline.

This plan will be used to execute your plan, as well as help you raise debt and equity funds.Finally, you will need to sell your plan to potential stakeholders.

You need to structure the deal you see doing and allocate cost and value to the stakeholders according to the parties respective contributionsThis too broad a discussion to cover here Send me a DM if you’d like to chat

And there's so many variables aside from just the water itself, like politics in multiple states, multiple potential failure points (Lake Mead/Hoover Dam, Lake Powell/Glen Canyon, etc), water rights of multiple competing stakeholders with often conflicting agendas (upper basin vs lower basin, farmers vs commercial non-farm users vs residential users, etc.) then there's the Department of the Interior which has ultimate authority over the Colorado River. 

Putting money in increases your stakehold in the company.

And we could potently see less of this civil unrest, because facing facts as facts are, It is no secret that the minority population is the majority stake holder in the lower class.

You should definitely talk it over with your parent though and get their input as they are stakeholders in this property.I assume you've already checked with your HOA and you are indeed allowed to use the unit as a rental?