Not sure if this is the proper category. I'm brand new to the website and not yet familiar with the breakdown of the forums, so I apologize if this question is better suited in another location. 

I am unsure of what form to use to submit my offer.

I am purchasing storage units with seller financing from my parents. I am hoping to submit them with a formal purchase offer today. The units are located in Utah and I live in Nevada. I was using this form; Real Estate Purchase Contract from the Utah Division of Real Estate website, but I also came across this one; purchase and sale agreement for commercial real estate - CCIM Utah. As you can see the Commercial form is specifically for use for licensed Utah Realtors which I'm not. I do not have an agent and don't intend to use one for this purchase.

I know this is a super rookie question, but does it matter for this situation which form I use?

Do I need a commercial specific form or will the Real Estate Purchase Contract form be sufficient?

Thank you so much for any advice or feedback anyone is willing to offer. It is greatly appreciated.

Best Regards,

Michael