Ah, this thread brings back memories! Memories of my wife silently cursing my packrat ways over the last 18 years. But now I catch her from time to time bragging about how many thousands of dollars I've saved us by fixing something around the house with parts I've--uh--recycled. My eyes are getting misty.
Besides my camper obsession, I love hot rods, and a project I'm working on has actually made me money as I have scavenged and traded. It's a worthy goal, building a tear for nothing. How better to prove you love our natural world than to save a little bit of her each time you don't use something newly manufactured?
It's not treehugging, it's self-preservation. And it's cool.
Go ahead and get your project started because it's just like having kids...if you wait to start until you're skilled enough or rich enough, you'll never do it. And just look at what you'd miss!
In planning any project you've never attempted before, always allow for the three three's: It will take you three times longer, three times more material, and three times more money than you thought.