Wedding Invitations

Hi! I am trying to figure out how I want to go about doing my Wedding invitation evelopes. Both my fiance and I have terrible hand writing and I wanted to try and find a way to customize each envelope via something like vistaprint without it costing too much money as we're having a budget friendly wedding. For some context, we aren't having a traditional wedding, our wedding is being spread out between two different days due to when our local courthouse does their ceremonies. Any help/ advise is much appriciated.