The basic XL ReptiBreezes on sale are usually around $80 or so on line (or were a couple of years ago - with all this tariff BS, who knows now). Keep watch on Petco, Petsmart and other sites for sales on them. Often there’s added discount codes. While the winter holidays are the best times for sales, spring and Easter should be bringing some too.
If you have a Mist King, they sell wedges to reinforce your misting heads against the frame.
https://junglehobbies.com/screen-top-wedge.html FYI: I always purchase the MK accessories directly from them - much cheaper than Amazon and I know they’re authentic. I’m not sure if those would work with other misting systems. I was in a pinch and didn’t have enough of the wedges so used some heavier plastic from a tote lid. If need be, you can do that and it will be custom to your misting head size. You will have to poke a hole in the screen top to get your misting head size heads thru. The wedge secures to the frame edge or corner with screws.
I keep it to one basking area, but they do what they want.

My plant lights are quite bright and half the time I find 2 of my panthers sitting under those like they are basking. There is UVB for the entire length.
You’ll definitely want a solid way to secure branches and plants properly. Dragon Ledges are amazing and super strong when used properly. While not as sturdy, garden trellis works well. I secure it to the frames with wire and some of the wires were wrapped around screws I put for that purpose. If you do use trellis, do make sure to sand dull the edges as they can be sharp.