If you are worried about budget, keep in mind that you will need a decent thermostat. There are some out there for $30 or you can get a light dimmer for a little less then that but remember, you get what you pay for. A good thermostat will cost you $100 or more. If you realisticly think you will want more BPs in the future then maybe look into buying or building (saves money) a rack system. A word of warning though, if you buy a 5 tub rack, you will find yourself quickly filling them up. These guys are addicting!