In large part due to Foreign Direct Investment (FDI).

And since the Delaware LLC is a member of the WA LLC, I do not need to register the Delaware LLC with WA state as a foreign entity, is this correct?

Any success stories from people who own real estate in any of the areas like Thailand, Cambodia, Vietnam, etc.Also how difficult did you find the buying process to be for a foreigner?

That is the case for any LLC, foreign or domestic. 

Engaging a real estate agent with experience in international transactions can also provide valuable guidance.Lastly, consider currency fluctuations and their impact on expenses and income.

Unfortunately you cannot directly buy land as a foreigner, but there are ways to get around it by setting up some contracts with a "trusted" local. 

I am a foreign investor who owns two rental properties in OH.

@Megan StaffordYou can probably do it either way - if you form in AR, you will need to register as a foreign LLC in CA.

Also I’m not very familiar with the process of foreign RE investing.

Some helpful links are: https://www.irs.gov/individuals/international-taxpayers/foreign-persons-receiving-rental-income-from-us-real-propertyhttps://www.irs.gov/individuals/international-taxpayers/firpta-withholding