Def consider an older dog as well as looking at puppies but you may find rescues will not home to full time workers any more than some breeders would.
Do lots of homework about dogwalkers and doggy daycare and have arrangements lined up before you approach either source to reassure them of your commitment. But day care or walkers will be costly 5 days a week.
Insurance is about £20 a month and doesn't cover routine stuff plus an excess means you will have costs even on a bigger bill. Plus even with insurance, most vets will expect you to settle the bill then claim on insurance
Our eldest dog Jasper was rehomed for a 3rd time in 9 months because the original 2 owners had un-realistic views on what it meant to have a dog. We were also first time owners but anticipated a puppy might chew things - which he did, plaster off walls, tv aerials, printer cables etc etc. We soon learnt to give him a safe area during the time I was out (4 hours) and lots of exercise and better food helped a lot. The middle pup never tried to chew, the third has even tried removing wall-paper in the kitchen and I was in
I always leave a radio on when I'm out but it's not the same as being there. It does mask some un-expected sounds that might start them barking and upset the neighbours though...
We had a rabbit till last year, both cockers at the time ignored Smudge, but the terrier we were going to home before they came on the scene, would of ripped it to shreds if it got in..
With lots of comitment you could make it work, but heart, sole and money must be made available too.