There is a lot of negative thinking out there about large families. Personally I think if you would like another (or even more than one!) go for it, it has nothing to do with anyone else. And once they meet the baby, what are your family going to say really...?! 'Oh, now that thats number 7 it looks ugly and you shouldnt have done it and we dont want to see that grandchild/neice/nephew only the other ones'??! Of course not! They'll love it just the same as the ones before.
The whole population argument is nonsense, its a top heavy population being poorly tackled by govt increasing retirement ages and raising taxes. You are effectively creating more future earners, spenders and tax payers than most families so I'd ignore comments like that. There is a lot of be said for the social side of larger families, the relationships the siblings will have (usually, not always) will last them through life, even when friends seems scarce.
My sister has 8. On the trot, the eldest is about 9 I guess (I lose track to be fair!) And they are the happiest brood, its heartening. All smart, happy kids. I see how much work she puts in and can only be impressed. She's a stay at home mum, husband works. Not, as some people like to paint large families, living on benefits and popping out sprogs for the state to look after. There can be a snotty attitude - her previous GP told her to stop when she had five. As if it were any of her business.
Also, its not really about money. You dont need a tv in every bedroom and 100s spent on individual xmas pressies and all that jazz - I see my friends do it and I think its mad to be honest. You need enough money to feed them and keep them clothed and in decent health and all the basic things. But a lot of people see luxuries as essential these days when its not the case. If you are happy to sacrifice annual hols and gadgets and trendy clothes and satellite TV or whatever it is you might have given up, then fair play to you. Their happiness isnt tied that closely to your finances.
Also, as much as people are free to choose to have one or two or three, you are free to have 7 or 8 or any number you want. It galls me that people who exercise their rights to limits numbers wish to deny others their right not to limit (I'm riled about that as I heard a lady on a radio show only this week say that a caller who had 10 children 'had no right' and was costing the taxpayer etc.)
I'd say you need to want another baby for the whole package another baby brings, for the childhood and growing up, another little being in your family, rather than just because you like breastfeeding or something so finite, but I'm sure you were just remarking on that as a by the by...