Welcome to the board!
Another question for renting a storage unit - what happens if you miss a rent payment? I know that people run businesses from rental units, but I think the rental unit is a small warehouse to them. Temperature control is important, but just as important is what exactly does that mean? I don't know the weather cycles in Utah, but if temp control means 45 degrees in winter and 85 degrees in summer, that could become uncomfortable to work in.
'Varmint' control is a good thing to know about. My mom rented a unit for a couple of years. The mice loved all the stuff to nest in and chewed up a few things, as well.
Let us know how it turns out.