We have this same issue. We are engaged as a main contractor and complete any risk appropriate prequalification checks in house with subcontractors, yet have spent 1000’s prequalifying ourselves to various systems. I don’t think one system of prequalification is the answer, more that clients should do their own due diligence. I’d sooner go and show a client what they are getting from us than sit at my desk gathering paperwork for a high score.