Estimate on the wire needed is under $200. The wire that is on there NOW is NOT chicken wire, and NOT suitable(which is why I'm re-wiring it).
The estimate is from Lowe's, and is for enough wire to do a 20 x 22 x 7ft pen top, bottom, and sides. In 50 ft rolls. The actual amount was right at $180 I believe. 300ft of 4ft wire, and 100ft of 3ft wire.

The estimate does not include the lumber I'll need for the new door, or the mulch, etc. That's just the wire.
My 8x8ft pen was about $200 total for all the lumber, plywood, wire etc. I have pics of that too, up on here, you can search and find it I'm sure.