All the decent size companies in my area (6-10 employees) run a 4-5k, 120, 150, 200-240, and a 300.
That is a lot of iron. No one around here runs that heavy with so few employees. The largest excavtion companies don't own anything less than a 210. The smaller residential guys run either a 120, 160 or 210. None have a mini. One guy has three 225's and a 308 he does a mix of residential and heavy commerical. Interesting to see how companies organize themselves around the country.