Morning coffee on fresh wood changes how you use your whole yard, turning dead grass into an outdoor room you will actually sit in. Building in early spring beats the summer contractor rush and usually secures better rates before demand peaks. Most professional deck builds take about one to two weeks of actual labor once the permits clear, but getting on a builder's calendar takes planning right now.
You need to talk to at least three different contractors to get competing quotes for your layout and materials. Do not just take the first estimate you get, because prices and timelines can swing wildly between builders. Once you have a clear picture of the actual costs, you can line up your payment strategy.
Remember that the 18-month intro window is a strict deadline, not free money, and any remaining balance after those 18 months will get hit with standard interest charges.