A dedicated workshop turns a messy garage into a place where you actually finish projects. Once the bench is set and your tools are mounted on the wall, you stop hunting for a screwdriver and start building.
Hardware stores run their best sales around Father's Day, so wait for that window. Get at least three quotes if you are hiring someone to build the structure, or price out the raw lumber and pegboard yourself before you commit.
The 0% intro window is a deadline, not free money. If you have a remaining balance after the 18 months are up, the bank will start charging interest on whatever is left over.