My daughter is in her third year of Architecture, and believe me, the professors are giving "Me" a run for the money. Latest....She is designing a summer home in the mountains at a scale of 1:20. Problem is her mountain site is well over 20 meters and he wants a topo model done as well as floor plans , model etc. etc. We have no problems with the latter since I (we) have an incredible home hobby shop. My (our) problem is that the model must not exceed .1 meters in height at any given lift. Do the math, we are talking significant amount of work. Any ideas on what material we can use to do a topo at .1 m intervals without cutting 200 sheets of card board? which at the hobby shop is not cheap. P.s he does not want to see corrugations on the sections. Now, I have seen a special cardboard for topographic layouts but man is it x-pensive. Is there an alt or am I just cheap....