Man. I wish my dad were into rockets. I also wish I could afford to have a rocket hobby. I remember one time in school I had to get a rocket for some reason and freakin' LOVED it. I was hooked! However, we couldn't afford this hobby so I had to let go of it before even getting more boosters or engines or whatever they're called (fireworks that don't blow up hehe). I am 34 years old now, but I would definitely be outside right now playing with my rockets if I had the money. lol We have a recreation center just over a block away from us that has a large field due to having 4 baseball fields.
Anyway, back to your build. lol
it isnt expensive if you just buy as you go. we build small rockets all the way up to composite engine rockets. we have one 6 ft tall. i can post pics it's fun but at anyrate here is whati have today.