Avg a Grand a week, week in and week out...not so much, but a grand avg for WEEKS WORKED over a yrs time probably... now that doesn't mean 52 weeks in service because that ain't going to happen unless you have hired a divorce lawyer...I avg 21 days a month out here (my wife loves it and does a happy dance when i leave after bein out of service) and i am averaging over a grand a week, bit i don't work 52 weeks a yr and have no plans of doing so.
One thing that you didn't say or ask about is being out here alone for weeks on end. You better like yourself alot, and enjoy talking to yourself and answering yourself... lol ...yea its funny but its also true, this job isn't for everyone and no amount of money can make that way. As was said above there are great benefits to being self employed and being out here and not answering to a time clock or boss (well you still answer to the wife) and those things can be there weight in gold, but it can't be all about money either...me i love the road, the countryside, and the tresures of small town America and the people you meet....
Oh and if you really want to do this, beyond having a van to start, have a small fund of maybe 3 months worth of "fixed" expenses in the bank just to pay for the bills in the 1st few months as you build a cash flow....