In IEEE Spectrum, quite a detailed article. Requires making satellites in standard ways and thus easier to repair. The ultimate example of this. Much to learn too about robotic challenges under constraints and gathering data to stage efforts. This seems like a better commercial idea than sending tourists into orbit.
Inside DARPA’s Mission to Send a Repair Robot to Geosynchronous Orbit
The RSGS spacecraft could visit and inspect dozens of satellites
By Gordon Roesler, Paul Jaffe and Glen Henshaw ...