if you are smart, and lucky you can make a living from this. I have spent in the neighborhood of 8-15,000. the first year I made back about 2000 and this year im expecting to make back around 5000 . if I just keep the animals I have now I could potentially make a lot of money in a couple of years. personally, I enjoy doing it and if I loose for the first few years I don't care. its all worth it.
I look at it this way. if you were to start any kind of business they say to expect to loose money for at least 5 years. and most businesses take at least 50,000 to start. If I were to invest 50,000 to begin with I'm sure I would have made triple that in 5 years time. but it all comes down to smart decisions and a lot of luck.
spend money on supplies first then snakes. I know people who have very expensive snakes but don't even have a thermostat on their cage.