Not sure about weiners quality but it seems like they have a few levels.
I got a TMG3070 at Richie Bros for $2,700.00 (about half price) to store boats in. Same china crap as weiners but cheaper...... May be worth a look at RB, they have had some at the last few auctions.
We will see how long it stays up for, you never know. Last winter I had an expensive "all weather shelters" one collapse while the $200 canadian tire one right beside it stayed up (steeper roof slope obviously).