Is this construction for a residential property you own as a landlord? What kind of construction is this?
If this is something like adding a room, kitchen, or bathroom renovation, or add on, I would recommend saving up and going with a larger company. Not only will they be more reliable, but you're also likely to get a warranty on their work (sometimes even lifetime). Plus, you won't have to worry about legal issues, they will already have a procedure in place, a reputation to uphold, and their own lawyers to take care of liabilities, and you'll just have to sign. A little extra cash can save a lot of headaches down the road.