...and here's my reasons why......
Unless you are a professional, this is not an arts and crafts project. This is your wedding veil, the crowning topper to your wedding dress.
So you bought a pattern and some tulle and it looks easy...but I've seen some really screwed up crooked concoctions because its NOT as easy as it looks. Its hard to get it gathered and sewn onto a comb evenly. Trust me on this one. You'll have flat spots and bunches and it will look really bad. Its really difficult and tedious work to sew on beads and a hot glue gun will burn through the tulle or glue the tulle to your work surface. You can't embroider on tulle with an ordinary sewing machine, it will get stuck in the feed of the machine and tear it. And how do I know this? Because I've done all of the above at one time or the other. I had a line of bridal veils that I sold nationally. I've done a lot of custom veils and I've got all the right tools and the experience and its very difficult and tedious work.
The tulle you buy in the fabric or craft store is not the same quality as you would get in a purchased veil. The fabric store tulle is heavier, has wider holes in the tulle and it is stiffer. It may not be wide enough and give you the fullness you need for your veil. You can't seam tulle. The stiffer tulle doesn't fall, drape or hang properly. It sticks out where it shouldn't.
You wouldn't buy an expensive pair of Italian shoes and then wear a dress you made in a sewing class to a formal affair. Its the same thing as wearing your wedding dress with a homemade veil. It just doesn't work.
If you need to save money on your veil, there are bargains on great veils. Every bridal salon has marked down veils. Ebay has a lot of deals. And you can always borrow one from a friend of family member.