Here’s how I’m currently thinking about it:The interest rate on my existing property is 3.5%, so I’d like to maintain that rate rather than refinancing the entire loan.

That being said my residential rental will have a positive cash flow of $500 and I plan to rent out this other side of the duplex immediately and will have a balance of 600 to cover for the mortgage.

Jacob,The advice you are getting from this guy who is "in lending" is very vague and is not covering all of the fine lines that manufactured home financing requires.

If you convert it to a rental and sell later, you may owe capital gains tax + depreciation recapture, unless using a 1031 exchange to defer taxes by reinvesting in multifamily.Leveraging $100K in equity via HELOC or cash-out refinance can help fund the next deal, but ensure rental cash flow covers debt, expenses, and reserves.

You are considering putting a tiny home on your existing property as an ADU or using that money to save up and buy the next investment property and wondering which would be the wiser choice.I think ADUs can help provide additional, much needed, housing.

Would an umbrella policy cover us? 

If the Owner wishes toterminate the agreement during an existing tenancy the owner will be held liable for payment ofmanagement fees for the duration of the existing lease as well as a $300 + GST cancelationfee.

We specialize in investments but can certainly cover all things residential.

It's probably going to mean paying points at closing, a high rate, and a serious pre-payment penalty (like 5 years). 

Sounds like you’ve covered a lot of ground in just four years—BRRRRs, wholesaling, land flipping, and now lending.