How to convince my mom to let me get a sugar glider?

So i found out about sugar gliders and i REALLY want one! i showed my mom all these websites and she thought they were cute. I was at a 90% yes until i kept bothering her about it! oh no! i was so mad! i searched probably about 30 websites on sugar gliders and i know everything about them. I have the money for it all! i know how much they cost and the toys and cage and all that. My dad already said he was cool with it if my mom was cool with it. i know they are a lot of work and a lot of money but i am up for the challenge. PLEASE don't say anything i need to know (not to be rude!) about them i just need to know how to get my mom to say yes! i already said i would keep my room spotless and take care of him properly! please help me! thanks! <3