Someone told me when I was getting into paintball that the money you spend on a loader, will be paid back in the games you aren't sitting on the bench cleaning your gun out.
I got a halo when I had the money. I paid like $30 for it on a used BST back in 09, they are a lot cheaper now I'd imagine. I'd suggest a force feed loader if at all possible.
That said, you can run a revvy on a blind gun. I run my timmy with a revvy and eyes off whenever it gets used. Just don't shoot too fast for too long.