Oh boy . It's addictive.

You can reduce the costs some by building SPADs, you can build the airframe for $10-$15. Yes, ten to 15 dollars.

However, be warned that many SPADders wind up spending more money in the end because it's so fast and cheap and easy to build new airframes that they wind up with piles of them, and not enough engines and flightpacks to go around.

SPAD website:
www.spadtothebone.com