Help me get another betta fish?

I really want to get another fish, but my mom said that 'Your turning into a fish hoarder.' Pffft, I only have a ten gallon and two betta tanks! I just want one more! Seriously! (Okay I want more then that but I have to stop there, honestly.) I told her that most people I know own more three or more fish tanks. Can you help me out so I can get a new betta fish? Even if you only have one or two fish tanks, post on here the number of fish tanks you have so I can see what the majority is and prove to my mom that we don't have 'too many fish'!