Aces I feel your pain on people not taking poker seriously. My dad is my best friend in the entire world and he thinks it is a pipedream and not likely(which is probably is). After a few months of talking to him and discussing poker strategy
with him it got to the point where I won't even call discuss this with him because of his remarks and not backing me up in my passion for something. Luckily my gf does support me (only because she has seen me win big) but doesn't play and still thinks i should win every time i play. lol if only...but having the support of someone close to you is irreplaceable. Without it you feel alone and I know the feeling.
But as far as your question goes I have 3 kids, a full time 40+hr week job, go to school full time, have a fiance, and somehow still manage to spend time reading poker articles and poker discussions and play poker nightly. I don't sleep a lot but I have ambitions and responsibilities so I have to make sacrifices.
Is it possible to play or study after your wife goes to sleep, or early in the morning before kids get up for school? I don't know your profession but is it possible on your lunch break? You created this thread and have replied to it a few times so you have some free time. Make the most of your time everyday, don't squander a single minute. I promise you there is time somewhere.
And as far as the family distracting you. Trust me for 1 year my current fiance(my 3 kids mother) and I were not together and for the first 3-4 months I loved it. I had so much freedom and did everything I wanted to do with no nagging or fussing from a woman. But it was a fools paradise. Be there for your wife and kids. Your kids will always need you and they hopefully be your best friends for life. I understand you talking about divorce but it is so hard on kids so do everything possible before you do that. Besides I feel like leaving someone when they're sick and can't take care of themselves is disgraceful.
Sorry post was so long but I wanted you to know what i thought and the reasons why I thought that way. Thanks for reading whole post and good luck in life, your decision and your marriage.