If you truly want professional advise to confirm what the other forum is telling you, or to assist with your own research, I would suggest paying for a consultation with a CPA rather than relying on that of a free/public forum. 

I want to thank Rent To Retirement & Zach, who got me a free consultation for.The costs to do this do reduce cash flow as well as the administrative time to file the different returns/reports are real, but it is worth it to reduce liability for the long term. 

Additionally, income from an active business inside of a retirement account will be subject to UBIT (unrelated business income tax), so be sure to consult with a qualified tax professional about the implications. 

Another option is to find a good local architect, civil engineer, or similiar third party consultant to take a look at it and let you know their thoughts on the viability of developing it. 

But I would consult with a CPA that specializes in STR.

As Brian emphasized, consulting with your legal team is crucial in such matters, 

Consult your tax professional.  

Consulting with a real estate attorney and a tax professional will help navigate the legalities and optimize tax impacts of owning a rental property in your chosen location.

Always consult with your attorney before you rely on the above information.

If you are not sure regarding notice wording, consult an attorney.