I'm a SAHM. DH & I make ends meet and have 2 DC. We've had a particularly expensive couple of years which has left us with some small debts which we are managing and will have cleared soon. We don't have any savings and are 30. Once our DC are in school I will work again and we'll have more spare cash to get savings together. We don't own our house.
If we're going to have another DC, now is the time. If we wait & I get back into work, then it's just more time off down the line & paying for childcare etc. If we have one now, we will have them all in school by the time I'm 35 so still plenty of time for me to have a good career.
Just to make sure I'm giving you all the information, DH will get 50k around the time he turns 40 (don't want to elaborate and out myself) so we will have some money coming our way in the next 10 years. Also we'd be buying in either Scotland or the North of England where home ownership isn't so expensive.
Would we be foolish to have another child in these circumstances? DH & I would both love another child and a sibling for our existing DC.