MvM Money Hack?

you will have to start a MVM game on your own server and turn on sv_cheats very likely, it's all server-sided

Well if you do single player just type currency_give 999999, or the amount you want it will cap at 30k though.

K, Ill give it a shot

The easiest and more legit way of getting it is to install sourcemod, metamod: source and then get the plugin called "Share Cash" for tf2.

EDIT: I host servers with 30000$ starting credits and custom waves pm me if u want to try it out, its actualy pretty fun.

I joined a server with infinite money in bootcamp, someone said it was aserver setting or plugin.

you can get infinite money by using console commands but you need sv_cheats 1