But I can save money, do it faster and do it right. Unless you have an unlimited supply of time and patience, you should not use a DIY project as an opportunity to learn a new skill. Books, TV shows, the Internet or one-day seminars are no substitute for thorough training and years of experience. Any long-time homeowner can tell you that a DIY project will take more time usually two or three times more than you expect. If you have a deadline, chances are you will end up compromising quality to get it done on time.
Safety is always an issue.
When our neighborhood was new, someone rented a tractor-mounted auger and offered to drill fence postholes for anyone who wanted them. Several men climbed on the tractor to add weight so the auger could dig into the clay soil. We narrowly averted a disaster for several families. One well intended DIYer removed a wall to enlarge a room only to discover that the removed wall supported the floor above, and it began to collapse. You should always consider how the quality of your work will affect resale.