If a bride is talented with design and experienced with crafting I think it's great to add their own special touch to their wedding day.
Personally, if not leave it to the pros. In the long run it does cost more time and money. We have alot of customers that come to us that already tried to DIY and now need favors in a rush.
If it's a small wedding and it won't be like making 3k of invitations;) Visit http://www.wherewedding.co.uk/ for amazing wedding venues inspirations