I am currently in the process of purchasing my own "Old House". The Plan was to move in and add an addition and move the kitchen. Before signing I had an oil tank search done (house is currently heated with hot water) and low and behold there is a buried, leaking tank. I swore I would kill the deal if it was so but........I am awaiting the results of the soil samples (nightmare). Any way, in the meantime I am getting feedback from people telling me that what I think I am going to spend on my renovations and addition I should double and double the time expected as well. Is there any advice as to how to stay close to my budget and time line? I realize the more reputable the contractor the better but even with everything in writing should I still expect to double the time and money?