$200 to play 25nL is suicide man. I have had a few 10+ buy in downswings playing 25NL.

Even the best players in the world would not attempt to play with less than 20 buy ins, and in fact, most people that play for a living have double the buyins in their working bankroll than you would have when just building a roll.

I would read all of the posts on here about BR management. Its more about freedom and comfort than anything. Would you be willing to stack off with an open ender and flush draw knowing its for 1/4 of your br? Are you going to hesitate to stack off preflop to a guy running 70/40 preflop with 1010-QQ? How about what you do when you hit that 10 high flush and the other guy shoves?
So please read all the posts.. 'rilla wrote a great one. Theres another one I recently that drew parallels between playing poker and going camping in the winter time in a place like Alaska. Firelogs are your bankroll. Would you stack only 5 or 6 logs for the entire winter? Or would you pile about 1000 of them to the ceiling to make sure you didn't have even a remote chance of running out? You BR is basically you. With insufficient firewood, you die in a few days; with 4 buyins, it will take less than a few days.

The best advice I can give.. never deposit money again in your life... ever. What's your rush anyways? Poker is a lifetime game...