
A pair of stable older dogs may adapt to your work patterns. sometimes when an owner dies and two dogs are left.
Older dogs often find it harder to find a new home, and the time you can spend with them before and after work is bound to be more attention than they will get in kennels.
I would go for two dogs of say 4 to 8 years, they will keep each other company, and by the time the older one goes you will be a few years down the line (and more experinced) and ready to cope with the demands of a puppy.
Working and dog ownership can work (as long as the dogs have canine company) if the ownere is prepared to put the work in. This would mean getting up at say 5am each and every work day to take the dogs out for a good hours walk, settle them while you change and have breakfast,,leave on the TV or Radio. Then pop in and let them out at Lunchtime, and on returning home in the evening a walk again for the dogs. come home make tea, and feed them after you have eaten.
If yopu have an active social life, then it won't work, as there aren't enough hours in the day.