I am trying to expand my business to offer more than just the basic lawn and property maintenance. The lighting that I have looked into is the low voltage plug and play kits that you find at lowes or home depot to avoid having to get the electrical or contractor license for the higher end products (which are ridiculously expensive). With every system, a transformer is needed ($50-$200) how every much wire (roughly $0.50 per ft) lights range from $20-50 per light The wire can be put in with an edger, shovel etc. so it doesn't have to be deep and can be left exposed or covered by mulch or rock in the flower beds. Any suggestions on how I should price this? Mark up materials by certain percentage, charge for wire by the foot?