Perhaps least expensive of all, gravel lends itself to easy DIY installation. That's partly because the loose stones are permeable and present no drainage challenges. It's low maintenance too; besides weeding, the gravel needs only to be topped up every year. Just be sure to include edging on both sides of the path to contain the stones. Note, too, that if your path needs to be cleared after snowfalls, gravel isn't the best choice. Likewise, it's unsuitable for steep slopes.
Zillow Digs home on Bainbridge Island, WA