i'm not sure i have any answers, maybe my situation is different, as i never really wanted 4 kids (much as i love them all dearly), and my youngest is disabled, so i probably have to do more than most parents of 4 do iyswim.
they are great kids, but it's just hard work, my oldest is almost 15 and my youngest is 6,the range of emotions with that age span usually ensures some drama or other is going on
it's noisy, messy, more expensive (food bills, clothing, birthdays christmas, that kind of stuff), going away or out for the day is like army maneouvres, you need so much and it takes such planning
i am always tired and often short tempered, and as i have so many they dont get as much attention as they probably should.
i feel like eor's raincloud, telling you all this !