The stuff you use for etching your own boards tend to be pretty nasty. Enough to burn holes in clothes and give you a rash if you're careless. Like other said, it's more economical to order boards through services like OSHPark and Seeed. If you want to make your own board for educational purposes or super quick turnaround (<24 hours) I think you're better off milling it. More of a hassle but much safer. Get a cheap CNC like a 3020 or something.