aledad, I did say if you can cope and manage, I hope that would include a thought about how to support them all financially .
although the birth rate is heading up slightly, the trend over the last 50 years as a whole is very much down in this country. 30 years ago the average family did have 2.4 kids, now it is 1.7 but is climbing slightly but at this rate, immigration will be the only way of maintaining the population as 1.7 kids per couple means a declining population. in sweden some years ago, the population was declining because the birth rate had plummetted to only something like 1 child per couple.
here and the population was actually in negative growth. here, 25% of births I seem to have read somewhere are to foreign mums when they consist of less than 10% of the population. but it is expected that thier children will have less children per couple meaning that unless more immigration comes in, the population will start to fall again, or rather what I should write is that the population will age before falling. if thier are too many older people compared to younger people, that will put a massive strain on the state, far bigger than having an extra child will if you see what I mean.
it all evens out though in the long run. I am one of 3 kids. my sister has no kids, I have one and my other sister has 5, therefore 6 adults and 6 kids = population replenishment without growth or decline.
if your original 6 were unruly or a handful in general, I doubt you would be keen to have another unless you are from that group of people who enjoy self inflicted torment
my sister does find it difficult, but as a family we all pull together. my sister who has no kids and I are often there to help as is my mum. all 6 kids between us consider us all as de facto parents, my youngest niece oftens calls me dad by mistake (but does correct herself quite quickly).
I am sure aledad that if you are asking on this forum about a 7th child, you are either playing devils advocate, have your tongue in your cheek or genuinely want to think about this and so would not enter into a 7th child lightly. personally, most of what I have written is tongue in cheek and with your original post, there does seem an element of that in you too, ''fill the last seat in my vauxhall vivaro'' indeed