Complicated ba magpa-cement and tile ng lupa?

I need to have a portion of our perimeter tiled and gated. Our contractor family friend estimated 10 to 15 days. I was surprised because the area is so small I am not sure if it is cheaper for me to just tile the whole area. We have bamboo on our perimeter and I don't want it cut. Maybe that complicates the tiling and drainage? Also, how much is the going rate of a contractor now? x percent of materials and labor diba? Ayaw kasi niya magpabayad so the last time he did repairs for us, my Mom just gave 10% ata of labor+materials.