unfortunately I can't afford any of these

Got one son in collage, and the second one warming up for it ! Aww the heck with being a good Dad, I think I'm going to let them pay there own way! LOL!!
Been looking at some cheaper things, but I'd lke to have something with 4 channels, and something that is not only good slow..so I can get the hang of it

... but something that when I DO get the hang of it I can have some fun throwing it around a bit. Any suggestions?