Investing in the maintenance of your home will save your family thousands down the road. What I can tell you, not painting an exterior will cost you much more in the long run. seeing many exteriors not getting painted, being way overdue, thereby deteriorating beyond restoration, needing replacement, costing much more than keeping up with a fresh quality paint coating for one's trim and exterior siding. Saving over 400% of your money, I can't think of a better way of preserving one's home, saving thousands in the process.