Getting quotes will help you if you already knew exactly what work you needed performed, but if I had talked to 3 water infiltration mitigation companies I would have just ended up with 3 quotes in the tens of thousands of dollar range. None of them did landscaping, which was what I actually needed. So I wouldn't rely on quotes when there's any ambiguity in the problem. I would rely on quotes if e.g. I needed to replace my entire roof, or replace all my windows. Those at least are narrowly scoped.