Otto,
If you are serious about the $5.00 entry fee, why have a contest at all? Just do a raffle, and charge $5.00 a ticket. You will get far more response than a design contest will. Far more people will go after a raffle ticket in which they invest nothing but money vs. folks investing a lot of time and effort into a layout design AND paying $5.00.
Another thought is that it is a mistake to do "any scale" model RR plans. I don't see how a G scaler or and O scaler can compete with a Z, N, or HO design. IMHO, pick one scale to make it fair. Anyone can design in any scale. For example, I don't own a single piece of N-scale rolling stock, yet I was able to design a good N-scale "door" layout for a friend. But if I tried to do the same in O? It'd be a siding or two, and very little else.
If you are serious about the $5.00 entry fee, why have a contest at all? Just do a raffle, and charge $5.00 a ticket. You will get far more response than a design contest will. Far more people will go after a raffle ticket in which they invest nothing but money vs. folks investing a lot of time and effort into a layout design AND paying $5.00.
Another thought is that it is a mistake to do "any scale" model RR plans. I don't see how a G scaler or and O scaler can compete with a Z, N, or HO design. IMHO, pick one scale to make it fair. Anyone can design in any scale. For example, I don't own a single piece of N-scale rolling stock, yet I was able to design a good N-scale "door" layout for a friend. But if I tried to do the same in O? It'd be a siding or two, and very little else.