Is their a min. amount of kH/s needed to reasonably solo-mine LTC?

[glendall]

Hi guys. Noobie question. Did a bit of Googling but could not find any good resources on this.

Basically, for litecoin mining, is the difficulty still low enough to make solo-mining reasonable?  By reasonable I mean to say it is pretty likely I'll be within +/-50% of what I would get from a mining pool in a month?

Is there a certain amount of kH/s that is a recommended min. for effective solo-mining?

Thanks.