I'll just add that I used what I am pretty sure was a low end UE coated polyester tent early in my touring career. Mine was a crazy heavy dome tent. Three of us were sharing it for 73 days on the Trans America and it saw lots of use car camping for years after. It got loaned out a lot to other people and is still fine now that it is a decade and a half old.
So yeah, no reason the polyester is likely to suddenly self destruct on your trip.