Regarding selling these, there is a mortgage note forum here that you can learn to see who the players are in the space. 

I'm new to this space and would love to connect with you to learn how to work with ALE.

@Trent Davis- This is on a slab foundation with a crawl space. 

For an unrenovated 1+Den/1BA LTR in our section of Northeast though, $1,300-1,400/month is certainly in the ballpark of what I could comfortably get with some very minor improvements to the space between tenants.So all that being said, I think your target of $1,500-1,600/month for your 2BR units would be more than doable. 

I'm considering converting the shed into a DADU to maximize the use of the space and earn some extra income. 

This is public info and usually it will change based on seller being there a long time or something like an elderly tax rate.What are insurance costs like (we've got a lot of local variability around fire insurance for ex.)?

Most Buyers don't even know that there is a public access portal to search local listings.

It does have nice destination and asan owner i like the private beach (not so good for the public). 

Generally this exception only applies in the higher end home space.  

Space X is growing there and Elon has plans of this city.