What's wrong with a minecraft server?

I'm a 13 year old boy and i asked my dad if he could help me get a server on minecraft because he would have to type in am "administrators password" in order for me to proceed to get my server. The reason i wanted a server is because i wanted to play with my next door neighbor who doesn't have a server. My dad said that if i made anserver other people would access my computer and send my information to some criminal group. I then explained to him that you can only have a limited amount of people in your server and you can make a private one if you only want certain people on it. He just said no and said that we would lose all of our money.minecraft is not a scam game.over 8, 000, 000people have an account and have servers. So i don't think that we will lose all of our money.
i then told him that my neighbor isn't a criminal and i just want to play the game with him. He did the same exact thing when i wanted to buy the game. I'm really mad right now and i think hes being suspicious over nothing. I have looked up videos of minecraft servers goig wrong and i HAVEN't FOUND ANY. So i would be very grateful if you could respond to my problem and show my dad that hes being completely unreasonable. (sorry for typos i'm doing this on an iphone)

I apologise if my answer is not helpful in the least.
A minecraft server is different to a server. It's not as though people will access your information.
They can't.
It is very unreasonable if I should speak my mind up.
My friend's the owner of LOLCraft Australia and he doesn't have problems. In fact, there are hardly any problems with hacking on minecraft servers.
You won't lose all your money. It does cost a reasonable price to work a minecraft server (like 20 a month).
Or…
You could look for a server already made to play on.
You could try LOLCraft Australia if you like a server that's safe, reasonable and fair. Just search up https://sites.google.com/site/lolcraftau/ and fill out the application form. Your friend will be able to play as well as long as you guys are premium.
Anyway, good luck, whatever the decision.