Hello again, hope all is well. I think your idea has great potential but your time limit of 14 weeks may be a bit unreasonable unless you have time and energy to really hussle and are very organized. Three things you may want to consider:
a} entice people to open the bag with some kind of incentive, drawing for a vacation, car, gold coin, dinner for two, or whatever.
b} make sure that there are coupons in the bag each month for local food, plumbing, hair cuts, auto repair, and oil changes. Even if you have to give these retailers a break even or small loss type deal, their coupons will add value to your doormat bag.
c} Business to business advertising is often more expensive than business to consumer advertising. Your business model allows you to also offer a business targeted ad product, so long as the local laws do not prevent it. Attorneys, web designers, telecom companies, computer companies, and others need to target businesses.
If you need a website, you know where to go. Take care,