Considering the volatility in the housing market, and the growing populous demand for affordable housing I think you’re valuing real estate extravagantly.
Its a house of cards. When you have 20 properties, you are 20x'ing your risk of getting the lemon. My uncle started down this path 30 years ago and eventually got royally screwed. Its a chain, this choice of investment chains you to a wage.
The only two groups I'm interested in as tenants are low income housing and corporate tenants. That's why I'm in industrial real estate.
Either way, this royalty agreement by comparison does not look like a good investment. The illiquidity of it means I need much higher returns IMO.
Not unless you expect a communist revolution in the next ten years