Many hats, one head.
Believe it or not, the phrase "wearing many hats" is not a good thing.
When you add that phrase to your job posting, what you're actually saying is "you'll do the work of four people, but we'll only pay you for one".
You're also almost guaranteeing that your future employee will suffer from burn out, as well as losing money and productivity trying to determine who is actually responsible for certain tasks and staff.
Instead of taking advantage of eager, prospective employees, consider outsourcing your work! Bookkeeping/accounting, calendar management, scheduling, database management, supply ordering and SO MUCH MORE can be done by virtual assistants, bookkeepers, and accountants.
Save your company time (and money!) and stop piling the work of four people onto one person.