I really like the idea of building one of these. I'm in the
dreaming stage right now.My brother was telling me he thought it would
cost $10,000 to build one and I'm wanting some idea of the cost.

You could spend more if you want, or since you have tools and skill maybe a
whole lot less. The Pitbull tractor gyro, last I checked, had a complete kit
for less than $10K. For more gyro manufactures start he

http://www.pra.org/directory/gyrocopters1.htm