It's absolutely essential to keep learning, so I applaud that a lot.

as the neighbor would retain some value in the land (easement for drain field) and the land is essentially un-developable, what is a fair price range?  

As of now, HELOC rates typically range from 5% to 7%, but it's essential to check with multiple lenders to get the most accurate and competitive rates.Joshua Christensen - I totally agree with these points as well. 

Cap rate is essentially just a ratio between income and price to buy.

It's essential to conduct thorough research, possibly consult with experts, and align your investment strategy with your financial objectives and risk tolerance.What are your thoughts on this topic?

You would essentially sign a lease on an apartment or home that is for rent, and sublease it on Airbnb.

Cousin A currently lives in one half of their primary residence and rents out the other half.Cousin B has a rental property they want to get rid of by doing a 1031 exchange.If Cousin B buys 50% of Cousin A's house as tenants in common, can A & B essentially switch over the rental income to B, whereby B reports all rental income and expenses on their taxes and A reports no rental income and expenses?

However, it’s essential to research the rental market trends in the area thoroughly.

Access to an STR isn't essential, but helpful and bonus when it's personal usage time..- Insurability & Operations costs: Can be considerably lower (especially in comparison to CA) with most coastal regions there is much lower wildfire risk and the properties that are in flood zones, have surprisingly accessible and affordable policy costs.

You could find an investment property HELOC for your current investments and use them to essentially by a property all cash to BRRRR and pay off the HELOC when you refinance.