Title II ideas
An interesting discussion on getting NFA permits issued to a trust, corporation or limited liability company, instead of to an individual.
One problem with an NFA permit is that it's issued to one person or entity, and only that one can possess the firearm. If the permit is to you, your spouse cannot use it without you being present, even tho the spouse is co-owner. I don't do trusts, but it does sound like an interesting idea.