I have the same problem, between working 40 hours and school another 40 hours I can go to the gym only thur, fri, sat, sun ( and Thursday I barley make it) but since you're bulking it should make it easier I think.
You're in the gym less you're burning less calories. Keeping more weight.
I'm 6'3 225-230lbs I can start gaining at low calories for my size.
Cycle your carbs. On the off days try n keep your carbs low and when you train bump up the carbs a bit.
Off days maybe like 50-100 carbs
On days 200-250 carbs
This is if your looking for a clean bulk.
If you're looking for a dirty bulk fucking eat everything.