Quote from @Leland S.:
Possibly the demand is still too high for beach homes to make the numbers investor friendly, or possibly I just need to make sure I find the right spot and build the right product.
I'm not sure this will ever change, and I'm not sure beachfront will ever be a 10 cap again unless you're looking in a very undesirable STR area.
People have traditionally bought beach homes as true 2nd homes. This limited prices somewhat as they had to stay reasonably priced enough that people could afford to pay an entire additional mortgage to have a family beachfront vacation home.
Now that the STR secret is out, it's more affordable than ever for people to own one as a 2nd home, even though the actual home prices are much higher. The people that used to look at having to pay $5000/mo to have a beach home see it as a great deal to be able to buy one now and "only" have to pay $1000 out of pocket each month after a PM rents it out for them. Or, if they can break even, "what a deal" in their mind.
It's the same problem in ski markets. Very desirable true second homes are tough to make cash flowing investment properties. Because investors might need that home to cost $1.2M in order to cashflow as a 10-cap, but there are too many people at that are willing to pay $1.8M and break even and have a true vacation home for their family that drive up the prices.