You know my world very well
Did you creep into my world and spend a day with me?:) I spent 4 years as a vendor engineer onsite at a customer's site taking care of some mainframes as the sole person managing and maintaining the site. There was only 1 other person that had access to the equipment and he had other duties and was seldom available. In addition to my normal work hours I spent 4 years of being oncall 7x24 365 days/year and I was burned out. Maintenance could only be done at night and usually only on Sat night. Many times I worked all day, went home and got 2-3 hours of sleep before returning to the site and working all night and then the next day. If I got finished earlythe only place to get some rest would be to lay down on the floor and take a nap. The unofficial oncall time was never reimbursed; it was just expected.
I left the IT field and attempted to make a go of the medical community but it did not work out. In the IT field you can focus on tech items and the people you work with do the same. In the medical field everyone had feelings and egos. As a male in an almost all female environment you could not say anything without getting someone upset with you. I returned to the IT field and now at the age of 54 have no intentions of moving anywhere else.