Good idea, thank you. I will perhaps try that before giving up and getting a better coop.
We are going to raise it 2ft off the floor to give them space under. I'm up for some DIY but my dad is handy so could help with that.
Do be sure and look through the coop pages in the link I posted earlier. There are literally thousands of ideas.
I am brainstorming ways to use your coop (and modify) so you can house birds comfortably.
If your dad is up to a fun project perhaps he can help you design a 4'x6' coop using ideas and inspiration from the coop pages.
Fence pickets make attractive siding and are easy to cut for making windows and doors.

If you get chicks they COULD use that coop for about 10-12 weeks. I wouldn't push it much past that age.