If you're even just a little mechanically inclined you should be able to figure out how to get these doors installed and working properly using just the basic instructions. Larger doors will need a forklift but we had our 14' tall x12' wide shop door replaced in only a couple hours. We had to rent a fork lift, but the cost of the door, forklift and beer & food for a couple of helpers it was still less than half the cost of having someone else do the job.