Well, Frank, it's the million-dollar question and probably only answered by the day/event. In my case, I'm determined to do certain things before I can't do them at all. It takes me a ridiculous amount of planning and an even more outrageous amount of time & energy to do most things.
When I really saw what is happening to me, I got more determined to do things knowing that it could kick my butt for long stretches of time. I made peace with it because I also know that I would hate myself for the rest of my life if I didn't make the effort and left myself with regrets.
So, I suppose, for me, I have chosen to go in those surges and accept the pay days as the cost of doing business. It feels good in my spirit when I look at the pics, or relive it with friends, or see it finished. It's a matter of feeling satisfied with myself.
So, my answer to myself is, if I want or need to do it, I will do it.