I have approximately, $120.00 in my coop - materials only. I have another 4-6 hours in building. It is not like doing differentials... it is quite easy and comes with a ton of satisfaction. If you all would like I can post some plans and cut lists.
Tools needed -
Mitre Saw (hand saw if your nuts)
Skill Saw for the roof, but you could have the lumber yard rip it
I would screw everything, as screws are removable and nails are - well nailed and can be troublesome to get out.
I would add some extras knowing what I know now, but all in all, I think this is doable for under $200.00, if your thrifty and a scavenger... maybe under $150.00.
If I get some people asking, I will go to the trouble.
Let me know.