This website very subjectively tells you about the US market and offers essentially 2 services:
Owners Rep in the early-medium stage investments
The reasons for increased use of third-party owner’s representatives are likely driven by a combination of the growing technical complexity and economic risk associated with modern construction projects, the evolution of new and more complex project delivery methods, and increased specialization of design professionals who have historically served the role of owner’s representative. Both private owners and public-sector awarding authorities are retaining project advisors to supplement their internal management and administrative capabilities and address gaps in services rendered by various investment professionals.
A course of my own investment experience
I have put together a basic course of essential traits and basic skills a private investor on the stock market must have prior to buying a single stock into the portfolio. Feel free to examine this site and see if you would like to obtain the access to this course.