A lifestyle should respect the organism expected to sustain it.

A way of living has to be survivable by the creature living it. Plans made on paper often assume a person who never gets tired, never gets ill, and does not need to eat properly, and the gap between that person and you is where most collapses happen. Design for the actual organism.

Look at your current schedule and ask whether a reasonable person could keep it for five years. If not, the schedule is wrong, not you.