I built my own Pole Barn (Roof only structure) from a kit https://jordantruss.com/
, but I'm on the east coast so probbaly no help to you.
I would suggest you learn all you can so when you find a supplier near you, you will know what to ask and look for.
Check out this site (Hansen Buildings), they have a great Blog where you can learn all about these structures https://www.hansenpolebuildings.com/blog/
Structure design, insulation, metal thickness, roof types, etc.