There is not a single reason to despair, even if the budget allocated for your wedding is kind of small. As I have already mentioned, there are many couples in this situation and they know the tricks they can use so as to still have the dream wedding they have always wanted. If you have no imagination or skills in what concerns creating your own wedding invitations, you can still find some cheap models in the stores which deal with such things.
Choose invitations that actually look inviting. Thick, high quality paper with bright colors or a unique design that makes the envelope stand out from other mail that may arrive on the same day. Your invitations should excite interest even before they are opened, and if you have chosen your design well, they should evoke reminders of the happy couple as well!