I grow on a budget. But I only grow for personal smoke, if your intent is to sell ,then you need to invest. Use CFLs daylight for veg and soft white for flower. You can get four packs at Home Depot for like $10 a piece. You want to get 23 watters (true watts, not the watt equivalent). Approximately 100 watts per plant, but you may need to add more depending on how large your plant gets. I have eight bulbs on my one 2 foot plant right now. I also just hook socket to plug connectors to a power strip and use y splitters to insert into the sockets (so that you have two bulbs per socket). These all cost about $2 each at home depot. You can mount the power strip in a number of ways, or fashion a box... etc. CFLs generally dont produce much heat so you may not need a fan at all. I just use a small 10" room fan.