I recently closed on 35 acres for a home site. As brief as possible- eventually will have a home overlooking a lake with large shop in the back and 5-7 acre horse pasture(Lord willing). Plan is to build 40x60 shop, divided down the middle. 30x40 living quarters(to be removed when house is built) and 30x40 garage. I am looking for general tips on how to do this most efficiently. We want it to be liveable(with 2 daughters, 3 and 4) for 1-3 yrs. Then it will be converted into more garage space or horse stalls or something else. I want to build it in a manner that is least wasteful, but still comfortable. I would like to lay out the septic system in a manner that will allow me to utilize it for the house if possible. Any tips from those who have done similar. Thanks.