It depends on your prices and turnover.
In this day and age with the competitive odds on offer from various sources it is quite possible to make a fulltime income with a bank of less than $10,000, if you're able to turn that bank over many times per week.
If you can turn over a $5,000 bank ten times then you are turning a $5,000 bank into a $50,000 bank with the same risk.
For example, I bet an average of three horses per race, cover 20 Australian races, 20 English races and 20 Irish races on average per day.
That's 180 bets per day.
So I turn over my bank many many times per week.
The odds of those horses determine whether I win or lose, the number of times I turn over that bank determines how much.
Stopping after a winner makes no mathematical sense, you have an edge or don't. However, some punters end up having silly bets or chasing losses, so for those with discipline problems, stopping after a winner might be the only way they can make a profit.
It could also be that their edge is in the early maiden type races.
