As a contractor, your reputation is only as good as your last project. You cannot afford to compromise the quality of your workmanship and the materials you use.
For example, the kind of lumber you should purchase will depend on the specific construction requirements of each project. If you find it difficult to source traditional lumber for joists and beams in the exact dimension you require, you might want to opt for engineered lumber that is made of composite materials and cut according to specification. This type of lumber is also eco-friendly since it utilizes wood particles such as sawmill scraps, thereby leading to less waste.
You should also be smart when it comes to your choice of tools and equipment. A hammer and nails are basic items, but a nail gun will get a job done faster. If you specialize in certain types of repairs, then you would do well to keep various items such as sink faucets, light fixtures, and wiring on hand at all times. A large tool kit is also ideal so that everything you need is in one place.
At any rate, the smart thing would be to look for a supplier that has all these items and more under one roof for your convenience.