Yup - another resource is "the E-myth revisited" which makes the point that if you want to be a baker, don't start a bakery because now you're dealing with taxes, permits, hiring, vendors, marketing, etc - not just baking.
Similarly, if you want to spend all your time programming, a true, short term consulting business isn't going to get you there.
I'd assume that (if all goes well) you'll bill 1000 hours a year (about 50% utilization with the balance going to sales, marketing, accounting, updating software, keeping up to date with the industry, etc). It's conservative (assuming you sell enough to be busy 40+ hrs a week every week), but it's better than assuming you'll bill 2000 hrs (40 hrs x 50 weeks) and finding you have to work 70 hours every week just to get by.
Similarly, if you want to spend all your time programming, a true, short term consulting business isn't going to get you there.
I'd assume that (if all goes well) you'll bill 1000 hours a year (about 50% utilization with the balance going to sales, marketing, accounting, updating software, keeping up to date with the industry, etc). It's conservative (assuming you sell enough to be busy 40+ hrs a week every week), but it's better than assuming you'll bill 2000 hrs (40 hrs x 50 weeks) and finding you have to work 70 hours every week just to get by.