Unfortunately I think nowadays they just go on Airbnb/VRBO and select/negotiate with hosts they find on the sites instead of seeking out providers.

The reality is the opposite - if it's not in writing then the PMC doesn't have to provide the service or can charge extra for it!

There are turnkey companies in the US that provide investors a completely renovated and tenanted property. 

One can get up to 8% with some big players.

My insurance agent often does an adequate job.That sentance alone tells me I should shop around agents/providers, but what is the easiest/most effective way to do that?

The realtor should be able to provide you with good referrals for property managers and contractors in your area. 

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It's a furnished rental so I had already provided one portable fan as part of the furnishings. 

Not sure if you are the lender or the buyer, but I've also heard/seen several buyers who have paid off the contract for deed, but can no longer find the seller to provide the release. 

What consumables do you provide your guests in your short-term rentals?