It affects the marketability/value of the property. 

Depends on the market!

I'd recommend speaking with local specialists in your target market to look at multiple investment options side-to-side.Lastly, some of my clients have been encouraged to stay away from HELOCs unless they expect a lump sum (inheritance, sale of other asset, bonus, etc.) to pay off the HELOC in the next year or 2. 

I'll hand it to Pace Morby tho- he is an amazing marketer. 

I'd recommend looking at costs. your build cost is going to be well over other homes because of the fixed costs like slab, Hvac, roof, etc. check the market drivers and weight the benefits of short term versus long term. long term is no furniture and help pays mortgage but at this size it doesn't really cover everything. we didn't find a lot of economies of scale in single family detached. can you build more than one unit?

I usually just google "market name" airbnb or short term regulations.

can the lot be sold on the open market? 

The property has remained 100% occupied throughout my ownership and is on track to continue receiving market rents from both tenants.

The property has remained 100% occupied throughout my ownership and is on track to continue receiving market rents from both tenants.

Marketing-Ready Design – Your rental should look as good on camera as it does in person.