I'm 33, been in the trade 11 years.
All my experience has been out in the field installing, commissioning and maintaining.
It's not something I'd be jumping into tomorrow, I'd do plenty research on the admin side before going ahead.
Where I stay there isn't a local security company, there are companies from surrounding areas that take care of things.
Why do you say it would be boring?
I'd take on an apprentice/labourer if needed and could afford to but have no desire for a large company with a team of employees - I've seen what goes on lol.