These are all great points.
I definitely need tuna alternatives.
I will give the tris a rest. I guess I am still skeptical of pushups doing so much, but they really are that good.
I think you are right 3-4 days a week is a good target for running. No squash courts here that I know of.
This whole thing was an eye opener for me as I thought I was in good shape (and I am compared to most people), but there is a level of fitness that is higher where you can do endurance sports like swimming and running, and I am currently not close to that yet.