hopingfor1more have you had any experience of adoption before or of looked after children?
Others have mentioned the time and emotional energy, so I won't go over that but I wondered about the physical space. Have you a spare room for that child so they would not share a room. Would them having their own room mean moving another of your children in with a sibling? These are questions you will be asked as well as the time and energy and emotional space ones.
I have a birth child and an adopted one. I had thought one more would be relatively easy but even aside from emotions and demands I have found more shopping, more food (now two faddy eaters instead of one) more laundry and just generally more to do.
The biggest challenge for me has been balancing the needs of birth dd (10) and adopted ds (now 4).
I wonder if you may find that it is helpful to explore fostering at this stage or in the future. I am just suggesting it because with so many already in the family to consider the needs of fostering is not (normally) a permanent arrangement and means that if the birth children find it very hard then it will most likely not be for ever. It would still give you the chance to love and 'parent' a sixth child but not permanently. It would give a huge amount to society, i feel foster carers give so much. I also feel quite a few foster homes do contain quite a few different kinds of children: birth kids or adopted alongside fostered kids, plus sometimes child-minded children, respite care children and in some cases grandchildren for older foster carers.
I know you did not ask about this but it may be a way to explore parenting a new child in a family setting without the long term commitment. This sounds awful, in the way I have expressed it, but actually provides an amazing service to a child. Also local councils are always crying out for good, loving caring homes for children who are in temporary need of a safe place to be. This might be for a few nights, weeks, months or in some cases years. It is a very different kettle of fish to adoption but it is equally essential and also requires a loving home.
Again fostered children would ideally need their own room and would bring with them all manner of issues etc. I am suggesting this as a possible option to consider not saying I think it is right in your family or situation.
hopingfor1more good luck in your quest, do not be put off enquiring if adoption is something you are really interested in. It would be a shame not to explore it even though you are aware with five birth children you are not the usual candidate, but then the world is made up of exceptions!
In my very humble opinion it is not that you will necessarily be successful now, you may or may not, but you may find you come back to this when your kids are a bit older of that the desire changes a bit.
All the best. 