Holy cow!! You have your hands full and getting fuller! lol
It's very nice to meet you and welcome to YT. I've been having food issues of late with my Sheltie (until a DNA tells me different lol). I just think not everything is right for every dog and you have to do what you have done...search and search. Still not gonna find the best for all (soon to be) 4, probably.
I considered home-cooking, also. But I just don't trust myself to get the nutrients right. And, if you are as busy as you surely seem to be, that's a lot to take on. I am cheering you on and let us know how it goes along the way, ok?