Exhaustion leads to bad decision-making, which leads to doing more work than you actually need to…which (ironically) leads to more exhaustion.
When I was working as a WordPress developer I once spent almost six months working on a plugin to make it easier for me to manage the horde of custom websites I was building for low-budget small business clients. One day, I woke up and realized THIS IS INSANE. I converted all my sites over to Squarespace, and in a few months I was making 10x what I made as a developer with ZERO MAINTENANCE.
TL;DR: Give your brain the time and space it needs to function properly or spend the rest of your life making no money and acting like a legit crazy person! :)