There was a very experienced shopper on the board who mentioned making I think it was $30,000 per year, which is about $575 per week. I gather there was a lot of travel with that and I don't know whether that was $30,000 in fees + reimbursements or just fees.
In an average month about half of the benefits I see from shopping are the value of reimbursements to me. I don't do video shopping which, at this time pays more, and I am not in a market that is glutted with shops but is glutted with shoppers. The average value of a shop (fee + reimbursement) is a little under $20. So if you are talking fee + reimbursement, you would need to be doing over 50 shops per week to reach your goal. That is 10 solid shops per day if you are working a 5 day week, 7-8 shops per day if you are working a 7 day week. Relatively few $20 shops can be found, studied, performed and reported in one hour, even if they lined up along the road side by side so you had no travel time involved.
Your situation may vary and I would not want to discourage you, but in my market it would not be at all possible, even if I had my significant other spending the day looking for shops for me.