The way brokers are paid is roughly the same as any bank pays its employee MLO except most brokers are able to select lower margins and sell lower rates/fees because they have lower overhead and less risk in their business model so it makes ensuring low origination costs easier. 

(Typing "Canada" out will help ensure that folks who know Canadian mortgages can offer input.

Whenever you are buying a property out of state you should do a few things to ensure it's as smooth as possible.Don't buy in the roughest neighborhood in the urban core.

Just ensure that the seller fully understands this contingency & that they agree without hesitancy.

I am currently seeking opportunity to become a broker/correspondent with a few lenders out there, while ensuring that I find the right fit and common goals.

Tell them you will conduct a final walkthrough to ensure there is no damage or deductions to that amount and as long as it is returned in the same state (excluding normal wear and tear) they will receive the full refund.

For those I'm on the fence about due to a credit score I've requested bank statements to ensure they can adequately cover the rent and are responsible with their income. 

But a great contract will ensure that you can win if you do have to go.

https://www.biggerpockets.com/blog/ensuring-solo-401k-compliance

And of course your primary stated goal if questioned isn't to have them out, it's to ensure there is no possibility that they still have stuff in there when the cleaner shows up, you want to ensure nothing could possibly be stolen.