I use units from each of those companies, and I've had one premature failure in the last 11 years (n=20 or so). 

However, if the borrower never intended to occupy the home or moves out prematurely without a valid reason, it could be considered a violation of FHA occupancy rules.

Occasionally, an investor will purchase an investment property with the intent to hold, and a negative catalyst will cause them to prematurely sell despite that intent, but I wouldn't bet on those happening on a regular basis.

I'm leaning towards trying to rent my house out, furnished, at a premium $3,000/mo after I re-build personal savings, but can't afford the risk of a tenant leaving prematurely and having a whole house vacant while also paying rent somewhere else.

However, there can always be specific circumstances that might cause an investor to prematurely sell.  

Quote from @Adam Michael Andrews: The whole point of investing in a note is that in a downside case you have some sort of surviving claim in BK even if it suffers a haircut or is equitized at that point.The fact that you are prematurely converted to equity in a default situation means you have the equity risk via that clause but have a capped upside if things go really well.

Cutting rates prematurely could reignite inflation, especially with factors like the threat of renewed tariffs—such as those proposed by former President Trump—looming on the horizon.

Do you think I'm right, or am I prematurely discounting using this method for trading and making money?

Selling just to avoid future capital gains might be premature—run the numbers both ways.

your way to premature to be shopping for a lender you need a capital partner first and foremost there are 100 lenders that will do the deal if you have the proper capital up front.