2 goldfish in 10 gallon tank?

hi everyone i know you think i am ridiculous putting 2 red cap oranda goldfish in a 10 gallon but i'm only 13 and i can't afford a bigger tank. is there any way of these 2 living for a long time? if so please tell me. i have a filter, 2 rocks, and some fake plants. please just i would want to get a bigger tank but i cant afford it so i would not like any un encouraging answers but just tell me please how long they will live and how i can take care of them. i know how to take care of them but i want to know better care for them in a 10 gallon. btw, the water is very very clean and ammonia, nitrite, nitrate, ph, etc are all normal.