I can buy a new, authentic NFL jersey for $99.99. One week rental is simply too high, it would have to come down to $14.99 before I'd consider it.
Just as a general comment, I'd picture myself using this most often when I attend a game while on vacation or a business trip. I already own jerseys for my own team.
Great idea nonetheless, wish you guys good luck.
You should also consider a jersey buyback option, for those of us who bought jerseys we no longer want.
You should consider subscriptions per sport, or seasonal subscriptions, i.e. a subscription that lasts for the duration of the NFL season. And with all of the new uniforms and uniform options in college football, those rentals should also be available.