For the love of snakes, mate, please sort things with this snake and get her healthy again before taking a shot at more snakes. Prove to yourself that you can be an awesome snakekeeper by helping this little girl thrive! Once she is alright, and your temps are stable (with 85f being the highest possible temp), then consider more snakes.
Snakes are not toys! They are living beings with specific needs. From everything you've posted on these 5 pages, your snake has been through a traumatic experience. Do you really want the others to do the same?
Try asking yourself why your snake stopped eating. You can find the answers repeatedly throughout this forum. Instead of taking offense to any of these posts, accept them, admit that you maybe made a mistake, and learn from them. Get your little anery eating and thriving, and then get more.
Can I ask, why do you even want more snakes? Isn't one pet enough, especially when she's not doing so well and needs your help and attention? Remember that each one is a major responsibility. I have 7, and I have to dedicate a lot of time to keep them clean, healthy, fed, and at correct temps.
On the other hand, you said that your mom doesn't approve. I'm thinking you should consider her. How old are you, anyway?