One such strategy that has been gaining popularity among seasoned investors is the BRRRR method, an acronym for Buy, Rehab, Rent, Refinance, and Repeat.

Or is a home equity line of credit still the popular method?

I would like to develop the property and build a house on it with intent to sell or rent out as an Airbnb in a popular wedding destination area. 

If its a popular area for vacations you could do a short term rental.

Sure, I'm biased being a NY resident, but this will negatively impact a lot of people in a lot of other high-income states, as well.High-income earners will certainly lose a hefty amount of Itemized Deductions (especially SALT), but the top rate of 39.6% has been reduced to 38.5%, so the overall net tax impact would depend on how high that income really is (and what other deductions came into play, of course).As for migration to tax-exempt states, I don't see that being a vastly popular move.

Church Hill is a great area, and likely to become even more popular with Stone having its operations in the area, which will likely attract even more services to the near east end.

From my international travels, I have seen the popularity of hostels throughout Europe but not as much here in the states.

Some very popular sites like Property Tracker and Real Yields that investors use to evaluate property will call it cap rate.

Again, obviously depends on the renters, but what are some trends and most popular requests owners/investors are seeing more recently?

Do you plan on telling the owner the truth  or do you plan on deceiving them which seems  the most popular method for uneducated people getting into the business