Could the club do a deal with the car showroom opposite the ground and raffle a car?
Could be a good second hand car worth 4-5k. The club buys it on a good deal (pay later), then takes any profit from the ticket sales.
£25 per ticket x 200 tickets = money back
sell 400+ then you start getting a big return. To get around the Lottery Act you just offer a 'special' programme or souvenir for £25 with a free chance to win a car.
Get the press involved and Welling could get a decent amount raised?