I would start by finding a quality property manager.

I'm still learning about what's realistic and possible, so I don't have this number yet- minimize taxes- protect liability exposure- if SDIRA is the right answer, the fees for custodians looked high - but moving the money will means saving my capital against market loss in my current Roth at the next downturn, so maybe the fees pay for the added security and additional benefits of REI.It's helpful to write this out.

However, I would highly suggest that you look at larger homes whichever community you look at.

The government pays a portion of the rent directly to the landlord, while the tenant pays the remaining amount based on their income.Get your property approved: Before you can rent to a Section 8 tenant, your property must meet certain housing quality standards (HQS) set by the Department of Housing and Urban Development (HUD).

The rate will be high but you won't have to provide any income documentation or leases. 

I went to High School with the Mortimer family!

Lastly 30% is too high for a STR management company, especially one that says how often or how long you can stay at your vacation home.

For example, there are many networks and conferences of Ultra high net worth individuals at the billion dollar and up level that gather all over the world at conferences looking for opportunities (prior to Covid-19 of course).

I think this is simply the case of as you mentioned, seller not needing to sell but will if someone pays high enough today.  

Myrtle beach is in high demand, Matter of fact I am currently in an ocean front unit 10 min south of Myrtle Beach, Garden City,