Hi cory
You should try to target the higher end of the wedding market as they will be more interested in more unique cards etc - and will have the money to pay for them.
Try approaching other wedding services in your area. Keep to the small exclusive outlets Bridal gowns, photographers, limo hire or vintage car hire, florists, etc. Suggest that you will do free work for them if they promote your services to their clients. For example you could do hand written cards for the wedding flowers. Be very specific in your offer as you are doing it for nothing.
Later you will know who to continuing to partner with and who to ditch, depending on how many referrals you get from each of your "partners".
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