So, what is the best option for me to have the capital to fund this property?

I think your clients should think about this as short-term funding that they would need to pay back rather than a long-term solution for capital.

A syndication was way overkill because there were only 5 capital partners so they customized an operating agreement with their attorney that outlined roles and responsibilities, distributions, membership interests, etc.And you don't have to have all this stuff figured out right now; it's very customary for us to assign the contract to whatever customized entity we end up forming.Just one caveat. 

If you need working capital, commercial credit cards, or help fixing your credit to get funded, I'm open to helping.

But I would remain open to long-term rental as an option as this seems like a more stable option in terms of income, again this may be my inexperience talking.However, I have always  been somewhat risk averse and investing in real estate is always a big venture, in my opinion/experience, in terms of capital.

There are services like Blockfi, Unchained Capital, and many others will will give you a short-term loan backed by your crypto assets.

Sellers tend to like to finance because it gives them control over when, and how much capital gains flow in and when and how much the balloon payment will be.

If you like to be risky with your capital maybe try putting it in some index funds, crypto, or stocks that you believe in and understand and then take it out when its made a good return and then use it for the downpayment.  

If you are not well capitalized, meaning you can not pay off the loan if called, stay away from sub to.  

Whether it’s developing new housing complexes or refurbishing existing ones for higher-end rentals, the opportunities for capitalizing on this growth are vast.The decision by Anduril Industries to set up shop in Columbus is a game-changer, signaling a major shift in the city's economic landscape that savvy investors should not overlook.