oomis1105, there are challenges that Kollel wives experience, but NOT that the men are less available. Men have a very set seder while they are learning. They get home the same time every day. They leave the same time every day. Whereas men that are working can come home very late depending on the season, often go on business trips, and can also be very tense and stressed out from the pressure.
I am not encouraging one over the other, just pointing out where men are more or less available.