Can you help me find homophone jokes? The more interesting the better.

I am 22 years old. I saved some money to buy a car, but I still need 20 thousand. Today, I told my mother that I wanted to buy a bigger toy, and I almost lost money. My mother asked me what I wanted to buy. I said I wanted to buy a car. She gave me a straight word. Is 20 yuan enough? For a moment, I thought I found it.