A consultant that is separate from your securities attorney can help you navigate this, but a competent securities attorney can help as well. 

Due to seller's financial needs however, a full cash-out offer was ultimately agreed upon, and a conventional commercial loan with a 10 year term amortized over 25 years with 27% down was secured.

It's a term so widely (ab)used that it kind of lost any specific meaning.

But what am I supposed to do in this situation that I'm in where I feel like I have no security that he has my best interests at heart?

They secure the money they lend to you with the asset.

which is about 5.5 percent on my equitysecond one is a old single wide mobile home that I get about $500/month rent after expenses;  the underlying land is now worth about $175,000;  which is total equity for me, since it is paid off;  so that would be about 3.5 percent on my equityproperties right beside each other in a very hot area, which just keeps getting hotter every year, with properties harder and harder to find there.  

I secured the HELOC and have been actively hunting for our first deal (my dad and I).

Typically these type of dispensaries have heavy security and I am not aware of there being any issues regarding theft, etc in the several years Colorado has had MJ approved for recreational use.

Money isn't abundant and I'm no where near financially secure.

That is what i'm seeing now, are you familiar with having a seasoned investor with those requirements sign as a "Guarantor'' on the loan to get qualified and secure the funding as a newbie investor?