I’m hosting my own P4 server, and the server depo is on Dropbox (I have a 1Tb SSD with a 1Tb Dropbox plan on it, that’s $99 a year)
My pc hosting the server is opened up to the web so anyone can log in to the P4 server. I’ve been using this setup for a while with no issues.
Since my project involves 5 people or less, this is way cheaper than paying for online P4 hosting, and I have all the control and space I need 
Also my internet is 1Gb up/down fiber optic…