Builder has some very good points. I also am in the construction business and see this thing all the time. We live in a "DIY Channel" home depot "you can do it, we can help" type society now. Because they read how to install tile in a book while standing in line at Home Depot, they are now an expert, why not make it a career? They saw someone build a deck on TV last night, why not build a couple decks in my spare time.
The media and other marketing has empowered the general public into thinking they are something they are not. They make it seem so easy to do it yourself that there is nothing to it as long as I follow the cookie cutter steps. The problem arises when something happens thats not "shown in the pictures." This is one small area where a professional contractor or tradesmen earns his money and the new to the market "contractor" falls on his face. The problem is the general homeowner can't distinguish between the two except the professional contractor was more money on his quote. They will figure it out 2 years from now when the work they did fails and cheaper contractor is nowhere to be found or doesnt even know how to fix the problem he/she created. They have no assets, insurance or professional reputation that can be leveraged.
Now I'm not saying that everyone starting out new is a hack, and that you cant make a sucessful business from your idea. I dont know anything about you personally, professionally or your competancies. Also, you have to do what you gotta do to survive. What I'm saying is, its just not that easy. Whether you are in it for the short term or long term, there are many costs that you need to cover to limit your exposure. You can create a little cash flow for a short time, it will catch up with you eventually. Insurance is so important now a days. Maintenance and equipment is just as bad. At least taxes are cheap, though.
Some are giving the advice of finding a niche. A niche is nice in a thriving economy, not what we are living in. You need to be diverse to stay alive in todays trades. I really dont want to be negative toward you and your situation, thats not my point. You are in an uphill battle that takes a lot of time and money to do correctly with the potential for disaster if you work for the wrong client. Also to me it is a issue of professionalism. It used to be that you had to have X years experience and training under someone else to go into your own buisiness. Now, anyone has no problem doing anything at any time and call it a business. This ventures into what I would call unprofessional. How are you going to answer your first customer when he asks" how many jobs have you done like this?" Are you going to look him in they eye and say "none"? What are you going to do when you hit that burried gas line that the homeowner forgot to tell you about. Looks like you forgot to call DIGSAFE and you are on the hook for evacuating the entire neighborhood for a gas leak. And doesnt look like that insurance policy you thought you could get away without isnt going to help. Dont worry though, they will sell your house and your tractor to pay for it when the court takes them away. Looks like you wont make your 30 bucks an hour today because they arent going to pay. Thats ok, you can file a lien, if you knew how.
Just trying to provide some food for thought. If you are going to do this, structure your business correctly from the start or be prepared to accept lots of risk to you and your family. And remember it takes years and many hard lessons till you will be a "professional" at this. No offense taken to anyone on this site and goodluck.