Interest only on 30 products used to be decent but now for what you save in the interest only period you really pay the price later when that period ends.If you are getting under value by 30%, then a plain FRM should work fine. 

Prioritize your financial stability.

-the fact that you will likely be investing / stabilizing during the first few years of owning an investment. 

Once you stabilize and raise the rents it would be the hope that the property would appraise for more and the owner would refi and get back significant returns.

The rent should comfortably cover the mortgage payments, especially with interest rates potentially stabilizing soon.

I agree that tariffs can be justified against certain countries like china on specific products where their govt is clearly subsidizing the manufacture of those goods and dumping the products to try to run the competition into the ground.That being said. 

I would suggest you use a different non-qm loan product that allows for family members to occupy but doesn't require you to make it a primary residence.

What types of products are you seeking?

It might be a good idea to look into what tech related companies are emerging with real estate-related products.

The fact that you've kept the same tenants for 4 years speaks to the stability of the rental income, which is key for buy-and-hold investments.Your strategy of house hacking and then moving into a rental property was a smart way to transition, and it’s clear that the live-in flip helped you build value.