
This could work. However it's the getting a pup in time for summer hols that is the problem! A pup that is well bred etc etc will hardly ever be avalible when you want (Murphey's Law!!!)
A 3 mth pup will be able to cope with only being left a couple of hours at a time.
While I was still in compusory education my parents where out the house by 8am, Myself and brother were out of house by 8:30am. I would get home at 1:20pm to let dogs out and go back at 1:50pm. Myself and brother returning home at 3:45 with at least one of us staying in. Parents home after work!
when we got a puppy parents annual leave would be for the puppy, approx 3-4 weeks between them to settle pup in.
This has worked for us with the last 2 dogs. Non of them are unhappy, dissobedient (infact always getting compliments on how well behaved our dogs are) and never any serious problems.
HOWEVER it does take hard work and dedication. You will loose out on social life in evening and weekends because you can't leave the dog when you don't have to. Although it workd for your friend will it work for you? Every dog is different!