Building a cabin in a tourist destination that does not have easy access to gas or electric.So I will need to run electric line anyway and considering installing underground propane tank, is it worth it?

I think your future self will thank you for doing that.Perhaps take out an equity line of credit in case you need it and using a property manager.

For this particular property, LTR GRM would likely be 21x - 23x; if Rabbu's average is correct, the GRM would be 16x - 18x for the target (approximately 6% cash on cash) so I'm trying to identify if that's in line with the area returns.

And what is your price point and are you looking for turn-key properties or something along the lines of a "fixer upper"?

It should go without saying, but I do understand when you're new to real estate expectations can be out of line with reality --- if you finance 100% of a deal you will not see any money out of the deal for many years and will be putting money in for many years.

Many note funds take on debt from larger lenders or lines of credit against their assets.

You can adjust them and shorter PPP's tend to have higher rates than long PPP's so keep these in line with you strategy with the property whether you want to hold long-term or refinance in a few years.If you're still looking for financing I'd be happy to help.

It also results in a nicer product, attracting better tenants. 

The basic premise is creating an LLC, opening a line of credit, even if small. 

He has used hard money as well as a line of credit from Chase for his homes.