In my early days of starting out in the world of contracting ... I bid a job for a small shopping center. The bid documents stated not to include the lighting because the tenants have not been selected yet. So, our bid was selected. Before we signed, the developer asks if our bid included the lighting. We said no, because the documents stated not to include the lighting.
That was my first inclination that the bidding process was flawed.
After several more run ins with developers and taking a General Contractor to court on a Mechanics Lein (which took me five years to settle) I changed to being a HVAC service contractor. Best move I ever made !