All the income from breeding reptiles? Does 99% rate high enough? Does 'reptiles' also allow for amphibians?
If so, tell your dad what snake you want, you've found someone ... right here. (Raising my hand).
Now if he wants someone who actually makes a decent income, doesn't live from one sale to the next, and doesn't need to rely heavily on a line of credit, then keep looking.
** There's a very good reason for my madness and "choice" of profession.
But where else can you make a living and have all the animals you've ever wanted?