[Seonta]

It depends on the shelter. Some will only keep cats and dogs and do automatically euthanize smaller animals. But some will contact rescues to come and get them. It all depends.
30 to 50 animals is way too many for one person to take care of. Can you feed them all? provide them with enough food?
Are you able to clearly identify males and females to keep them from breeding?
Is the food that you need to feed them accessible in your area?
Are you going to take them to regular vet visits?
You don't make enough money for all of that.
How much research have you done to know the cost of these animals? how are you going to find the time to clean the cages, trim the nails, and make sure they all get enough attention?
The amount that you are requesting is outrageous.