Well if you CAN afford a MH soon (next 2 weeks or so) then I'd just maybe get like 4 CFL's (6500K/23-26W) for the time being and then get the MH when you can afford it, but if it will be over a month, I'd suggest getting like 10-12 (plus some splitters from wal-mart) You can buy 9 splitters ($18) and 12 CFL ($20-$35 range) and that should get you through veg really well. Remember though if you use CFL, when it is time to flower, you will need the other spectrum (2500K-2700K).

In the long run the MH is cheaper after buying the ballast and reflector hoods. Plus you will only have to deal with one light rather than the 10-12 CFL.