That really sucks to hear and I wish you nothing but luck! I did a lot of homework before placing an order for our trailer, there were definitely cheaper options out there from tiny/new shops but they didn't offer what we were looking for and at the end of the day I wasn't going to shell over any money to anyone that I felt like they might cut and run. Too many nightmare stories in the off-road/vehicle world of shops funding existing projects with deposits from new orders, never being able to get caught up, and eventually just disappearing with money and parts that don't belong to them.
Considering you placed your order in 2020 and it's now 2022 it sure seems like you're going to end up learning a hard lesson about tiny shops and individuals running side businesses. Building trailers not being their primary source of income should've been a red-flag as well, along with all of the other red flags (shut down by PD due to likely zoning or permit issues, etc).
Wish I had more encouraging words, but I've seen people in this situation too many times.
Do you have a signed contract for the build/purchase of the trailer? A receipt for the deposit and receipt of wheels? Anything that states the deposit is refundable? Anything that provides an estimated completion date? Basically wondering if you have any documentation that would hold up in court if you end up going down that road.