bex - The bubble won't last forever. There will come a time when even the senior will wish to join the rest and have access to the full range of triplines. However, I can't see that inside at least 5 years or more!
But PTW/Longhaul (or both) are very valid options for yourself. As is LGW (I would say residing with a reasonable distance would be a good idea for that option though...) When I was junior at Gatters, I would still get a weekend or two off a month. If you went 75%, you'd know your weekends off miles in advance which is a massive bonus to your family.
As for 'providing'. Yup money is important, but (for me!) lifestyle trumps it...