How many chickens do you have?
In my experience, those Amazon coops are complete junk. They’re hard to clean (back breaking), the wood is terrible, the roosting bars are way too low, and you end up constantly modifying them.
I raised it, widened it, lengthened it, adding a 'breakfast nook', raised the roosting bars, added in fans, ventilation, etc.
After sinking about $600 and a ridiculous amount of frustration into my old one trying to 'expand it' every other week just attempting to house 3 chickens (and mine was bigger than yours- free range during the day), I finally accepted that chickens past 7 weeks stink (thanks, cecal droppings), and stink means flies… and so on. I eventually just bit the bullet and built a proper coop from scratch.
If you’re in the States, you’ve got an easier starting point: grab a basic shed with a full-size door, add real ventilation by cutting in windows and lining with HWC, install a couple of cubby-style nest boxes, attach a straight run, and you’re set.