I agree with Dbat - apply, then defer. Schools grant deferrals because their policy is to allow deferrals - they don't ask what you're going to do with that time.
I applied to college during my junior year, intending to enroll the following fall without having graduated high school, as a 16-year-old who would turn 17 in the first month or so of the fall semester. I was accepted everywhere except my first choice, who wait-listed me (but was notorious for never taking anyone from the wait list).
I sent deferred enrollment to my second choice school, and spent a gap year doing basically nothing but getting older, and reapplied early decision to my first choice, who took me.
IMHO, my gap year doing nothing was really less than ideal educationally. It doesn't sound like your DD will have the same problem.
She could resurrect her profit-sharing microbusiness and turn it into a NPO.
Tangent: if the business model here is, "I'll sell stuff and donate the profits to charity / use it to fund my charitable purpose," be aware that the IRS will not approve NPO status for that. Income from selling stuff that's not specifically in furtherance of the charitable purpose is UBTI (that is to say, completely taxable) to tax-exempt entities, so getting a charitable umbrella will just create heartache and aggravation for the charity.
