At walmart you can get the reddish spectrum cfl's (2700k spectrum) for flowering. They go by the name "ge" soft white , the "ge" soft white 100's (26 watt each) come in 2-packs for around $6.50 , or you can get the bigger "ge" soft white 150's (45 watts each) for around 8.50 but thats for a single bulb.

I would recommend getting the 26-watt 2-packs its a little cheaper and you get more lumens out of two 26 watt bulbs. For flowering one plant I would say four of the "GE Soft White 100" (reddish 2700k spectrum)26 watt cfl's , and two of the "GE 26 watt Daylight cfls" (Blueish 6500k spectrum) should work out nicely. You wont get as much bud as you would with HPS flowering with Cfl's but there are many growers who make nice harvest with Cfl's. And its cheap for a beginner.

Also walmart gots light timers for like $5 , which you'll need for the 12/12 flowering cycle.