Blog and Business URL question.

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I'm starting a auto brokerage business. I plan on driving traffic to the site with educational articles about the mechanics of a car lease, dealership motivations, etc. basically what i hope to be quality, unique content. My question is how should I structure the site with the different URLs? Say my blog is carleaseacademy.com but my biz name is Larry's Motors. Should one be a subdomain of the other or separate sites? Or should the blog just redirect to larrysmotors.com or vice versa?

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