Show the same areas
During visits, identify the areas you want reviewed and the conditions that remain uncertain. Ask each provider to note what it inspected and what it could not inspect. If one visit reveals a material change, communicate it to the other providers before treating their proposals as comparable.
Compare findings before prices
Ask which observations led to each proposed scope. WTG may identify an application opportunity while another provider recommends clearing or building work; those are different tasks. Resolve the sequence and boundaries first. A lower total is not meaningful if the proposals describe different areas, preparation or responsibilities.