This article/advertisement was written by an out of state attorney and there may be a review period in that state.
Consult with a Utah Real Estate Attorney. It’s worth a few hundred bucks. Also, if you go down this suggested path now, the buyers will almost certainly know of your reluctance and the other suggested plans above will likely close up.
I bet you can get out of this contract but you need good legal advice, not just good intentioned advice from a sports message board.