I have built a chicken coop on a very low budget that makes it look appealing and effective.
1 sheet of smart siding: $22
4 2x4x8 studs ripped in half: $8
Chicken Wire: $10
4x8 OSB: $7.50
Floor Mat Stripping for Ridge Cap: $2
The tools I use are a staple gun, screw gun, hammer, and a saw. For an experienced builder like me, it only took about 2 hours to make it, for an inexperienced builder, it would take about 4-5 hours possibly.
The main structure is 3ftx3ft and the run is 1.5ft away from the structure and the structure is about 2.5 feet high.
It will take some work, but it can be built.