I always wonder about people who "don't have time" to build. thats like saying you you don't have time to rejuvenate yourself. Personally, I have plenty of time, but I remember when I was a kid, my dad worked 10-12 hr a day, my mom was home with 3 kids, and he still had plenty of time to build, and thankfully, teach me.
I do [put an ARF together sometimes while I am working on a large project, but I sure do like to build, and amaze all the "flyers" at my field.