There's no arguing with someone in-the-know

-- you're within 10% plus or minus.
It was a lot of money, to be sure. But it was worth every single penny. I'll take the memory of those 10 days to my grave, and no matter what life still has in store for me, it will always be something I'll be so glad to have done.
Someone asked me this morning if was worth all the expense. After a moment's reflection, I responded that it wasn't an expense at all -- it was an investment in myself, one which will bear a wonderful return for the rest of my days.