There is no in game limit, but you probably don't want to manage more than 200 girls, that might be hard on your computer. On mine I can manage a lot though, like 1 000 it work great, just a pain in the ass to manage them...
Is 200 for people that have 2GB of RAM or 8?
Honestly, I don't know... RAM alone isn't really a measure of PC power.
That said, if you only have 2GB of ram your computer probably isn't powerful enough to run the game
Luckily i have 8 times more and maybe you should put the specs to run the game that way there is a baseline to experiment
