A fire pit turns the backyard into a four-season room. Once it is in, you skip the cold patio and head straight outside, even on a damp November night. The build itself usually wraps in a long weekend for a simple ring of pavers, or a full week if you are pouring a base, running a gas line, or building a stone surround.
Late fall and early winter are the cheapest time to book this. Landscapers and masons slow down once the leaves are down, and many will sharpen their numbers to keep crews busy. Get two or three quotes in the same week so the bids are comparable, and ask each one to spell out materials, labor, and cleanup in separate lines.
The 0% period is a deadline, not free money. If any balance is still on the card when the 18 months ends, standard interest gets added to the whole remaining amount, often back to the purchase date. Set a payoff date a month early, and treat the monthly $138.89 as a non-negotiable bill until the balance is zero.