If you can do that without causing damage to the surrounding area then by all means. I know torx extractor sets run between $25-$40 depending on where you find them. My experience with torx bolts though, you HAVE to clean the paint out of them with a scribe or punch or something before you try to remove them.
You can mig a nut to them and then use a socket or you can cut slots with a Dremel and use a screw driver. Another option, if you have room for grip, is to get some vice grips on the heads, I did this to get a couple torx bolts out when I pulled my rollbar. I replace torx bolts with hex heads whenever I can.
I have found over the years working on motorcycles that "most" can be removed easily with a hand-held impact (one of the ones you hit with a hammer). Sometimes if you tighten them on the first hit they will break loose and come right out. If you are stripping the heads, the bit has slipped. The impact usually will prevent this. They're fairly cheap ($30 or so) and are a necessary toll for a Jeep owner.
I tried the impact on some and I work great was afraid that would have strip them but it didnt great tip thanks
What strips them is the lack of applied pressure when attempting to turn them. Torx bolts are actually a very good design, but it takes pressure on the bit sometimes. I learned this trying to loosen them on our Harleys. They use torx bolts that are make from extremely soft metal. If you don't have a hand impact you are not going to get them loose. In the long run, they're way better than a phillips or straight slotted bolt.