First year they purchase the lights from us, so we charge almost double what we would of the cost to put up the lights. For example, we had a house last year where it cost $800 just for the lights. We inflated the price to around $1,400 for materials and then charged another $1,000 or so for the install. It only took the two of us about 2 hours to do the house. Second year we charge half of what we charged the first year. We start advertising near the middle of september all the way through to the end of October. Last year we just did cold calling and passed out some flyers, and a lot of business came from word of mouth as well.