Evaluating a total wreck of a house

[Tom R.]

I've located an unusual property that needs a lot of work but I think has a lot of potential. It's a 3/2 1100 sqft geodesic dome on 1.3 acres. It has a detached garage but it is in such bad shape that I think it will have to come down. The house will have to be completely redone inside and out. I think I can probably get it for less than 30k. How do you suggest I go about evaluating this house? I suppose I should bring a contractor with me when I checkout the property but I dont really know what else I should do.