where are you getting $250 from if you don't mind me asking? maybe if you want good seats, but you can usually find tickets for around $20. I was just looking at the Nationals website and they have tix starting at $10. Bring your own food and drinks and you're spending $150 tops for pretty decent seats at most ballparks.
I just got 4 tickets to a Mariners game. I am guessing it will be more than this (it always is), but this is what I am expecting:
4 lower level right center field - $184 ($46 x 4) - I know I could have went cheap and got the $20 ones ($15 plus fees), but I love the game and want the kids to enjoy the experience a little. Infield seats? I don't think so. Daddy is not made of money.
Parking - $20
Gas - $20 (roughly for an avg. family coming from suburbs?)
Food - $30 (you can bring in food, but no drinks. Well, I am not bringing in either, but say 4 dogs/4 drinks)
Souvineers - $20 (one $10 item for each kid. Hey, I want them to enjoy themselves and not cry.)
TOTAL - $274 - I am guessing some stadiums/cities are more and some are less, but Seattle probably a bit more than avg.