Tom, I use your sneaky way for small items. For tractors and such, I have to justify them to the boss financially. I start adding up all the money they will save, and at some point she says "So, we're gonna be rich! Yea, right!" and the deal is done.

I sold her the pond digging expenses by telling her that water was a great investment. After all, I said, a bottle of the good stuff costs a quarter, and the pond will hold about 6 million bottles. Again, we're rich... regular water tycoons.