First of all, you will not be able to claim Gift Aid as a trust when you are registered (this process will take around 3 weeks from when the forms have been completed). This is something available to charities, and an Industrial and Provident Society, whilst sharing some similarities in that it recycles its surplus (IPS's don't make profits, they make surpluses) back into the organisation, doesn't benefit from this particular tax break.
Second of all, as an organisation you will be able to lobby for a director, and you will legally be able to own shares as an organisation, but this obviously doesn't mean an entitlement to it in the legal sense. The general principle of the trust movement is that you don't hand over something for nothing; if you have money in the bank, you don't throw it down the black hole of the football club. With the greatest of respect to supporters groups who did that for years without reward, a supporters trust shouldn't be operating in that way. Use the money as a bargaining tool if you need to; if you have thousands in the bank, lobby for the supporters trust to be sold shares in return, as any investor would be. The difference is that you, as investors, don't seek to make money off the back of the club, and you're there for the longterm. Brentford's trust, Bees United, have maintained this principle. Even though the club have been in dire financial straits since they began running the club, and now since they've taken it over are still precarious, they have never simply given the club money. They loan it.
Finally, in terms of what division you're in next season, that's dependent on a lot of factors. My personal view is that the club is not necessarily in need of restarting, or dropping many divisions. The club needs to cut its cloth accordingly, which is just good business sense first of all; don't spend £1.01 if you can only afford to spend 99p. It might be that a voluntary relegation would be the best route, but I personally see no reason why that can't be within the Nationwide as a competition - to the South division. Loads of clubs down there smaller than you in crowd terms. Even St Albans, given they're 2nd in the NS, are only getting about what you are atm.
If you have any other queries, visit our website at www.supporters-direct.org. I'll be keeping an eye out for queries as well.