48 hours is good unless you observe copulations sooner. As soon as you see a lock, and they seperate, you can move the male onto the next female.... Other than that.. in your scenario... give your male some rest too! Don't forget to take a break... its a long process... you've got plenty of time. You're pairing animals from November to February or even later in some cases.... If you're doing 4 females, take 2 or 3 days off and offer some food.. he may eat, he may not.. but its good for him to have the rest and have the opportunity to eat... if he eats.. remember to give him the 48 hours to digest afterwards... then right back to female #1 again...

Its a tough life... 4 girls, eat, rest, 4 girls again... etc... they've got it rough...