For example, are the following types of insurance necessary for rehab projects, buy and hold properties, LLC protection, etc.?

The zoning issue is if it is not zoned for duplex, but is grandfathered- lots of loan companies will not go through because of lack of security (ie-value not protected).

Recommend you get an attorney to draft your first one to make sure that your interests are protected, the partners responsibilities and duties, are documented, and cost and profit sharing is clearly defined for all the possible contingencies that may arise.You may need to also consult a CPA regarding the partnership tax return that your partnership will need to file.

The author lost me when he wrote, "In fact, some allege that the U.S. wants to protect this [currency] status so badly that it invaded Iraq because the country began selling oil in euros instead of dollars."

The only reason why I recommended the non-recourse loan, as you already mentioned, was to protect other properties that have been acquired via private money.

Is there a way to protect your property from being included in their declaration?

And also the best insurance terms would protect my assets the most.

It protects you and the buyer.

If the seller accepts your offer and said he will evict the tenants before closing you need to put the full amount in escrow to protect the seller.

If one were paying all cash, they would have an 8% return plus tax benefits with some inflation protection via rent increases, but at the end of 20 years they would not get the principal back, so it's not truly an 8% return.