Even still in most cases leasing is what you want to do. Preferably in terms where they take care of maintenance (if the crankshaft fails inspection it doesn't increase your costs), and if "yours" is down you get a loaner. You probably want shared plane terms, not a plane that is all yours, and they provide trained pilots. There are lots of tax reasons this is better.

Buying a plane makes sense when it is your personal plane (and leasing your personal plane to the company is done - though the laws/ethics get weird) and you fly a lot. It also makes sense when you have several (though I don't know where the break even is). It make might sense for bragging rights, but generally your customers won't be as impressed as you think.