Just to give you a bit of encouragement. I'm 5 feet tall and barely 90 pounds. I have three kids under 10. I get being busy.
I built these brooders
and this rabbit tractor
Using just 4 tools - a hammer, an electric screwdriver, a cordless reciprocating saw, and wire snips.
You don't need a...
The coop is about 5x3. Adequate for about 4 adult dual-purpose breed hens. The run is about 43 sq ft, so that gives just enough room for 4. Could have build something yourself that was much larger for that price tag.
If you are able to assemble a prefab coop, you are more than capable of building your own. It's really not that hard. And most hardware/lumber stores will do all the major cuts for you.
Look through the coops section for ideas. Many of the coops featured there also have detailed plans.