to bedazzle or bejewel?

Hi eveyone, I don't know anything about this craft, but I need to make
some red rhinestoned t-shirts for an event in 2 weeks. I was wondering
which method is better to go with..the bedazzler or the Bejeweler..or
is there a better way to go for a novice like myself.
I can get a beddazler from ebay for about $10, but I'm not sure what
kind of stones I need to get with it..and there's something about
tiffany backs.
I did see one website that said not to go the bejewler way if you can
help it because it's time consuming. Help

Thank you!