A tip about grids. Instead of buying expensive gridding thread simply go to the store and buy a neon nylon or plastic type thread. It looks like fishing line. You could also buy fishing line and use. It saves a LOT of money.
Next the time to baste a grid is fast. You are basting. That means your stitches are large and running stitches vs normal sewing. Basting is extremely fast compared to normal stitching. The neons the nylons come in make it much easier to see and the thread moves quickly thru the fabric. Plus they come out easily.