When does diversifying become considered as spread too thin?

[Phong Bui]

I am continually developing my business plan and roadmap to set targets for myself. So far I have a portfolio for sfh/small mfh along with a portfolio for student/campus housing. However, I also have commercial real estate, larger apartments, and even short term/vacation rentals on my radar for the future.

How diverse are your real estate investments? How do you reign in your thoughts/wants? Do you try to cast a wide net, then evaluate which is most profitable/logical for yourself and then dive more into that? At what point is a portfolio considered too diverse and what are the risks?