Just as the property costs drastically range from lot to lot (from $4,000 all the way up to $100,000 and more, Feldman says), the needs of the purchasers also vary. Some individuals buy the lot then create and execute their own plans whereas others require guidance and assistance. Feldman provides free design advice to low-income participants of the program, and Growing Home provides a list of affiliated vendors and local businesses who offer discounts on materials and services. In Carrolton, Joyce Hickman, with the help of a contractor and volunteers, installed a rain garden on the lot next to her property. Layers of gravel and sand in a trench running the length of the land act as a water-holding trench before allowing the water to slowly seep back into the ground.