Banner tape works really well if you use good tape, but it's a lot more expensive than sewing. We do both, I've had both sewn banners fail (in 90+ mph winds) and taped banners fail (crap tape), so it's really a tossup. Obviously to get into sewing you're looking at an investment of at least $1000-1500 plus the additional space but after that it's next to free to hem banners. Tape costs nothing to get into but if you do any volume of banners taping them will cost you an arm and a leg. We put off buying a sewing machine for years, but we finally did when we realized we were averaging upwards of $300-500 a month for just the tape.