Ohh Nemo - I second, just get on with it
I have 4 6 and under, 3 beds and its fab.
DS1 is 6, 14 month gap between him and DS2, 22 month gap, dd1 then 2.5 years and little dd2 is 7 months old. It is hard work, but that's all it is. It's not rocket science, just constant hard work.
My theory has been that the smaller the gap, the closer they will be. And it is kind of true. The older 3 run as a pack, and although there is 3 years between DC1 and DC3, they all keep up.
I do sometimes feel as though I spend my life 'refereeing' their arguement. I get a lot of comfort from knowing they are not far apart in their schooling, so get to spend playtimes together and are good friends. If I look to the future I think they will always have each other, and look out for one another.
Because they are at school, I have time on my own with DC3, she is at nursery two mornings a week, so I have time with DC4.
It all works really well. I'd have another one