Construction / civil works contractor acquisition advisory

I am planning to acquire an construction/excavation/demolition company and require expert help for the due diligence process. I am looking for someone with broad experience in the contracting industry, in particular on the sales, legal, cost management and HR aspects of the business. This is not a large acquisition so my budget is small. I am a financial expert so marginal knowledge of such aspect is required. If the acquisition follows through, there are possibilities to continue work during the transition process under the new ownership. The job cannot be performed remotely because due diligence implies visits to business offices and work site, as well as meetings with current management. The business is located in central VA, thus knowledge about this market is crucial. Knowledge of adjacent markets (DC, MD) is highly desirable.