We got our money's worth from our agent and she worked her tail off.

Even as an introvert, a real estate agent can be your advocate.

Seems like short term would likely generate more revenue but not really sure about profit when you consider vacancy and property management fees of ~30% (I would consider remote management but I would think cleaning fees would still be ~$400/mo. which is high).

As a local investor and agent here in Columbus, let me know if you have any questions or want to connect! 

No agents, so no agent's fees.

Hiring one company to do the whole deal and outsourcing parts of the deal (using contractors and agents) is completely different.

Are you planning on being an agent and helping other people buy/sell houses?

I think between finding the right agent and property manager (unless you self manage) you'll be all set. 

Offer to refund his deposit immediately as long as there's no damage (you handle the cleaning).

You must be a multi-millionaire agent by now to speak to someone like this.