It sounds like you have found a great resource at a reasonable price. I made my own invites (I think I ended up with around 40) and although I loved being able to say I made them, because they turned out fantastic, they were still expensive and very time consuming. If you have found a designer that can work within your budget and give you the look you're going for, why not? Especially if she's going off a design you've picked, you still have your hand in it, just not all the hassle. I guess it just depends on how much you like projects. I wanted to DIY as much as possible, and although it's not always cheaper it was rewarding for me to do it...