My FI and I would like ample time (more than 1 month) to know how many guests are coming to our wedding because we are doing a lot of DIY projects and need to know how much material etc. we need to buy. For example we are making VIP passes for our escort cards. We have already sent out our Save the Dates a while ago and our friends and family all know when and where the wedding is going to be. We are getting married November 2 and were hoping to get our invites out by the last week of this month (August). Do you think it is appropriate to give our guests an RSVP date of September 21, which gives them only 3 weeks to respond? Thanks