I mean how does a DH who has been used to zero child/house-related responsibility change if at all? I'd really appreciate some insight on how this has worked for others.
It makes sense financially for me to go back but DCs are 7 (DS has ASD if that makes a difference) and i'm concerned that I'll be left doing everything I do now + work + childcare drama when anyone is ill etc 
DH is not an arse at all, he is lovely and works very hard himself, I feel lucky to have been at home for so long. I just can't imagine how the dynamic can change and don't want to end up taking a job and regretting it.