I looked a bit in your area and saw several sturdy ones.
Oh....that may change the recommendations then.
Any plans to move at this time?
Cities can be brutal about the "nope not here".
I found this ad interesting. I am sure the ones shown are more than $575. Just worth looking into.
https://hickory.craigslist.org/grq/d/hickory-handbuilt-chicken-tractors/7729950974.html
https://www.backyardchickens.com/articles/isabrownmoms-henny-pennys-house-coop-plans-and-pictures.47968/
https://www.backyardchickens.com/articles/so-cal-coop.75473/
Just a couple links to articles here on BYC.
There's a lot to know about building things. I will toss a few things here to assist.
A 2x4 actually measures 1.5x3.5. That's important when making plans and doing cuts.
A 4x8 coop is most efficient with using standard lumber. It will also give you the inside space you need.
With a raised...
Can you give more details?
Raised coop?
Walk in coop?
Is the planned site level?
Budget?
Tools available?
Anyone able to help with heavy or awkward pieces?
Way to haul the materials?
While there may be challenges each has a solution.