But I wouldn't be surprised to see us settle in the low 6.00% range.I have some aggressive bets in stocks and long duration bonds that will benefit if/when that happens.

Just make the other gig a longer duration.  

FHA has a lot more paperwork, up-front PMI, plus you have monthly PMI for the duration of the mortgage.

Sometimes they don’t like that because you don’t have skin in the game.As for advantages to the seller - are you going to pay them more for the property, that would be a perk that I offer in addition to making a little extra on interest for the duration of the loan.

Then a couple years later, discovered that a piece of paper was signed at closing which was never read and in fine print says something about the home being owner occupied throughout the duration of the mortgage... wtf?   

No prudent fund is operating 4-6% over prime and doing so without hiccups if there's any duration behind that, let alone 2x that yield.

Conditional and unconditional lien waivers prior to getting paid.Happy to chat more@Chirag Mehta @Ronald Rohde, I completely agree with obtaining conditional and unconditional waivers throughout the duration of the project.  

Also make sure you understand everything about adding an ADU including value of the ADYPU, financing, impact from rent control, duration between initial expense and initial income, true cash flow (know the 50% rule, at 50% rent ratio initial property tax will be near 20% of income)- educate.  

This is networking, tapping your current list of friends, family, co-workers, other real estate investors, etc.Ideal duration depends on business plan: I, personally, am a fan of long-term fixed rate loans.  

Even without changing interest rates, the duration of a mortgage is never as certain as that of other bonds.