I have a Beagle and a CKCS, about twice a month DH are both out of the house, me just school hours though. My CKCS can cope with being left for the 6 hours on this odd occasion - I walk him before I leave and as soon as I get back, but My Beagle was so naughty the evenings of the days she was left.
Even though she had long walk before and after, she just had too much energy and was a Pain in the butt, play fighting and charging round the living room like a loon.
Thing is I have to crate her when she is left as she is a room wrecker, CKCS is not crated as he is golden.
I decided to try doggy day care - found a lady who lives on route to my office, drop Beagle off on way to work and pick up after school run. Beagle loves it - has bonded with a black lab called lilly and plays with her all day! When she gets home she sleeps all evening! It's wonderful. She has great time and I get to experience life with a normal dog on those days instead of lunatic dog!
For us it works brilliantly, as CKCS wouldn't like it so I leave him at home, and Beagle loves it.
DH didn't want stranger coming in to house to take them out for walks - and I wouldn't want anyone to walk CKCS as he is nervous of other dogs when he is on his lead.
But I think it depends on your dog - there is a spaniel at daycare who spends all day sitting in kitchen as he is to0 scared of the other dogs to go outside and play!
it's £15 a day - but as I say I only need it a couple of days a month.