You might want to contact the poster in this thread:
https://www.backyardchickens.com/threads/cute-saltbox-chicken-house.1232360/
She has the same coop and should be able to give you some pointers on changes/additions to make it better.
Yes! That was the poster I was thinking about. Her experience doesn't match mine, but she details exactly what she does to make pre-fabs work for her. It seems like more effort than building a hoop coop to me, but her pre-fabs are cute.
Alter that list a little to raccoons, opossums...
To be fair, the OP is from Houston ~70 hurricanes since 1980 hit that general part of Texas (per wikipedia - I am not a hurricane buff) so it might need to be staked/tied down. Although pontoons might be more useful.
Everything pre-made in that price range is going to be flimsy. There is a poster here that has good luck with them but had to:
Paint/stain all the wood
Reinforce the wire panels
Replace the hardware
And probably some other stuff I am forgetting. Hopefully she will pipe up with info directly...