The price would probably skyrocket if they were allowed in the LSA catagory. I could have bought my 415C $10-12k cheaper 5 years ago.
You're right about aviation not being a 'budget' sport. By the time I get a hanger built and add a few avionic upgrades to my plane, I'll have 50k invested to go after the "$100 hamburger" in a 1946 model aircraft.
Those electing to purchase new planes better have a fat wallet.
Nothing quite like it though. What's the saying? "Flying is the second greatest thrill known to man. The first is landing!"