Hmm. Well, you can have one good grow in there or continuous grow in there but multiple grows will increase your electric bill + bulbs etc... And will give you just one month average. This depends on how much you'll smoke.
Your space is more than enough for 4 plants at least. If you'll smoke a lot grow 4 plants at once from beginning to the end. Than start another.

I already suggested what you need for multiple grows.
Here i'll suggest more reasonable option for you. This is the cheapest alternative based on lumen and watt.
Buy 2 ballast for $60 (1x55,1x80 they'll run 2 bulbs each)
Buy 4 bulb for $35 (2x55w6500k + 2x80w2700k)
Buy 4 socket. $5 (Not much necessary you can DIY)
Prices converted $ by me. They can be a bit different there but don't think there will be a huge difference.

First Run 2x55w 6500k bulbs for veg. Will hit 9600 lm. Enough for half of your tent. When switch to flower, run all. This will give you 21500lm with 270w and wide spectrum. Enough for your tent.
If you buy one more 55w 2700k bulb that will make more red in flowering room. Since they are cheap you can even buy two and go for flower with all red spectrum. Its up to you. You can think about 2700k bulbs later. For beginning you just need 2x55w 6500k bulbs and one ballast. The rest you can buy later as i said. This depends on your budget. You can also go with 6x55w (You'll need 3 ballasts). 330w. Oh yea
Most important thing is ballast. Get your ballast then don't worry about anything else.

Forget about one big bulb. If you're not able to go with PLL then go buy small e27 CFL. 4 or 6 for the beginnig, than later you can add more.

LetsSeeYa said and i'm totally agree with him. I previously used 6x18w for vegging. 6x23w for flowering. I had 2 beautiful lady.
Hope yours will be much more beautiful :thumbsup:

Go buy your bulbs and start your log already will you