If I, as a bond investor, am uncertain about what the future will bring, I might just sit on the sidelines and not invest.

You have to make it special.

You could agree with the Seller that you will accept up to $10,000 in the special assessment and the seller covers the remainder.

While I do maintain a relatively modest percentage of my assets in money market instruments, corporate debt funds, and high dividend stocks, I remain most comfortable with the investments I specialize in and know best.  

With interest rates holding steady (so far) and US Treasury yields hovering in the 4-5% range, many investors are weighing the pros and cons of staying in bonds versus seeking opportunities in real estate.

Tax-Exempt Bonds: Tribes can issue tax-exempt bonds for certain types of developments, reducing financing costs.Challenges: Projects often need to be structured as joint ventures or leases with the tribe, and compliance with tribal laws and federal rules is critical.

If you are self-employed with no full-time employees you may wish to consider opening a Solo 401k instead of a self-directed IRA as it has several advantages over an IRA LLC such as much higher contribution limits, direct checkbook control (i.e. no need to have the account at a speciality trust company), ability to take a 401k loan, exclusion from unrelated debt finance income tax with respect to investment in real estate acquired with non-recourse financing, etc.Can I contribute to both a Solo 401k and SDIRA?

You'll want to ask about their experience, read reviews, understand their availability, pricing, insurance / bonding, and how they safeguard their funds. 

I'm a Project Manager at an Architectural Firm specializing in Custom High-End Homes. 

You could also mitigate risk with a surety bond as well.