One of the good reasons not to be dates on your resume is because of gaps in your employment. I don't think taking some time off will hurt your chances for jobs in the future. To be honest, many stage managers take "time off" - work hard on tour for 18 months, and then takes some down time. It's happens a lot.
My only concern about taking time off is are you going to lose forward momentum you have built up? Will you loose hot connections?
The last thing is . . . if you get out of the business for awhile, will it be hard for you to come back to it. Let's be honest, making a living in the arts is hard work, and if you find you can make a living doing something else, it's awfully hard to leave behind a stable paycheck and jump back into the world.