I take my hat off to any off you that work 
Make me wonder how my house is still always a mess and i feel one step behind alot.
I just see my job as being mum cant imagine trying to fit another job in aswell.
I actually cant work...well it wouldnt pay me too as my wages would be cancelled out by childcare esp when it woudl be times by three. And then what do you do during holidays.
I did love my job though and its a factor in deciding on a fourth i soooo want one but i know it means i will be a sahm probably until my children are grown up by which point i couldnt go back to my previous work i would need to re train! I also have a dream of retraining to be a midwife but know it would not be possible one to train and two to work the job around the children.
But tbh honest i think that could be the case with three anyway. enless i except that i will see alot less of my children and someone else will be doing a chunk of the child rearing!
But hard to no for def if i want to give all of this up, i have had a very few odd moments where ive been desperate to work a day or two...i havent worked since going on mat leave with dd1 so nearly 5years.
Im not going to lie there has been moments where being a SAHM has driven me mad, but its also what ive always wanted when having my children so feel very lucky to be able to be fortunate enough to. I do find the loss of finacial independence hard at times, i would love to have a bit of my 'own' money which i have earned.
Although Even if we could afford to work i like to do it all myself and im a control freak i couldnt bare the thought of the children going to a minder or childcare setting.
I think im getting closer to definately wanting to go for no.4 but know its not the right time so would have to wait till at least jan12 to start trying which seems ages away 
But im with you verybusy my elsdest is 4 and maybe its easy to think i want another when i havent experienced the realities and financial strains of four older/ teenage children.
For example we can only afford (which is a push) for them to do one extra curricular activity which is swimming! So cant help thinking am i better having less children but be able to give them more oppotunities and more of my time, or one more child and yes they will have less luxuries, but will it matter, will they mind, i never had much but feel it was a different time when i was growning up, less pressure at school to have and do everything!!
I would like to think the bonus of an extra sibling (getting away from being one of three) and grwoing up in a large family would make up for it?? 