Obtaining equipment is easy. As TEC has said, having good employess is the key...once you have the work. Keeping them busy is the next hardest thing. IMO the profit margins on the bigger jobs are less. I have always found the competition on public works, and larger commercial projects, is tougher. It also usually requires more overhead. The amount of paper pushing on public works and commercial will require a lot of time. Managing those big jobs, while doing all the other things too can be challenging. TEC is right about the lawyer too. Not so much for lawsuits (hopefully) but for contract review/modification prior to the job. Wait until you see what the commercial contracts look like. Once you have taken the time to do the bid (bigger jobs take longer and are easier to miss things on), and you have bid the lowest, then you will talk about qualifications (assuming no prequalifications just to be a bidder), and then, if you pass those hurdles, you will enter into the contract/insurance negotiations. Which reminds me that you also need a sharp insurance agent too. If this sounds like your cup of tea (some people love to swim with sharks) then go for the big commercial stuff. So far, I have found that I prefer to work with smaller residential contractors, and light commercial. I still have some that I work with on a handshake. I can work for the margins that I prefer, and once you establish the relationship, you both know what to expect, and can better serve the customer and make more money.