When it's time for a new roof, you've got a lot of new choices these days, many of which will last more than 50 years. New engineered shingles are made to look like cedar or tile using recycled materials. Even metal roofs, the old standby for barns, have made a comeback with new colors, styles, and an unbeatable maintenance-free life expectancy.
If your smaller projects call for clear pine without any knots, you can save money by buying a lesser grade, then cutting out what you need from the clear areas between the knots. Also, when buying wood, remember that face grain is not critical for structural parts which won’t show. You can likewise save on lumber costs if you can use shorter or narrower boards, or if you only need one good side of lumber for your project.