It is generally hard to forecast how construction will go because there are normally many variables you have to deal with regardless of the size of your project. This is where a home construction contractor comes in. They take charge of your project and take responsibility for the outcome of the whole project, among other things.
The contractor first signs a contract with you before beginning work, and so anything that happens will be his sole responsibility to bear. The general contractor is in charge of subcontractors who are his responsibility to bring on board, vet, supervise, and pay. The contractor also knows when it will be more financially viable to bring in a specialized person who works within a specific niche.
A home construction contractor is also familiar with the materials in your area and all factors surrounding this. They have to know this to be able to get the best products and apply the most innovative processes for the project.
When hiring a contractor, you need to make sure you settle on a good one, as well as how and when to pay them. This can save you a potential headache with extra expenditure and failed project milestones.