Hi OP
You are certainly planning ahead and doing lots of research - you sound very considered 👍👍👍
We are first time dog owners and our Labrador was 1 last weekend. OMG, we love him and can’t remember life without him but I think for I really to work, they need to BECOME a big part of your life, not just fit in to your life.
He is such a kind, gentle natured dog.
Hardly barks at all (a consideration of you are leaving for a period of time).
Has two good walks a day then did sleep mostly (or humps his blanket - a LOT!) but is now getting more bored over time.
Puppy stage: ouchey ouchey rippy teeth until about 7 months. House - training - super-easy.
Leaving for short times: ok. Me & DH work from home 2 weekdays each and cleaner comes in on 5th day plus DH walks beforehand so he is only on his own for max of 2 - 3 hours infrequently but has been left for 6+ when we got stuck on motorway one time and wasn’t fazed by that at all (we have camera in house).
Like other poster said, he does want company when we are in so follows from room to room consistently and whines if we are upstairs during day and he’s not (he’s not allowed) except for bedtime when he goes into his crate from around 10.00pm and starts whining about 5.30am.
We do get him out at 5.30am as we don’t mind - he doesn’t want a wee, he just wants a friend as he goes back to sleep on you on sofa for a couple of hours if possible.
Our kids are 15 and 18... always wanted a dog a and totally love him but they are not good at taking for walks and continuing the training in the right way. He is also super-strong so daughter couldn’t walk him even if she wanted to.
What I will say is his personality is still developing. We had 1:1 training in addition as he was nervous & jumpy for a long time.. he’s not now, but he’s getting more bored more frequently so I’m constantly coming up with new toys & game to interest him.
We aren’t going aboard this year - (big change for us) we are doing a U.K. holiday with him so we don’t have to leave him.
I think your planning and work patterns sound fine as long as you’re prepared to prioritise.
Do think about the early starts all being on you though.. my DH does most or I’d be like a zombie.