But how would one find reliable contractors to do the repairs etc?

You get the more reliable LTR revenue that could support the building costs and the STR revenue to boost profits.

They provide you a great, reliable service (where services are not skipped or halfway completed) for a good price that is fair to the both of you. 

@Alexandra Reeves, in my experience, tape measure or laser measure is about the only reliable measuring device.  

Will you need a generator backup if there isn't reliable power there? 

You'll need reliable local contacts, such as a cleaning crew and maintenance professionals, who can handle on-the-ground tasks.

Regular long term rent: $750Airbnb ( only opened 2 months ago) : earning about $2800 on a not peak season. looks like it may hit the 4000 mark in April/May peak season....It is no more than 5 hours of work per week if you do it efficiently and find a reliable cleaning crew.

As primarily a luxury STR buyer's broker and 20 year mortgage broker I can testify the importance of a reliable and experienced strategic mortgage partner. 

Which is more rent reliable, best growing, both for cash flow and long term appreciation?

If you're selling to flipper and the contractor isn't part of that, not sure it will be possible to get a reliable person.