It is a great time of the year to be watching FB Marketplace and Craigslist for a used MAK, Yoder, Cookshack etc. If you are able to up your budget by $500, you do open up a few brand new American made pits (Yoder, Cookshack, and Blaz'n at least). For your budget and new, I'd probably be with the others that RecTeq and Grilla look to be some of the better constructed. One thing I have seen is many of the pellet grills have been adding and increasing the size of the upper shelves the past few years. Before that, many didn't have at all and those that did were like Weber gas grill warming racks, now many of them are capable of holding a full packer on the upper shelf.
However, there's your rotisserie requirement...doesn't that throw just about everything but GMG out the window? Broil King has one, but hasn't been too successful that I've seen getting into the pellet market. Have others introduced them recently? I'm curious for my own knowledge, have you noticed a big difference between comparing the same thing cooked on your GMG with and without the rotisserie? Most of the pellet manufacturers have dismissed the rotisserie concept saying it provides very little benefit since the cooking is indirect and convection to start with. The real proof is in the actual results though, so no idea if or how many of them tried before making those claims.
Another brand that I always seem to forget about is Smokin Brothers that might have some models in your price range. There made in US in MO and appear to be well constructed, they're just a little ugly in their design which I have a hard time getting past...I think the same about RecTeq's horns