Sadly you dont get “good” and “free” you must choose only one.
I can actually point you to a “reasonable” free option that I use with Hifi,
Its only 250MB, and it can be slow at times but it will get you out of trouble,
Go to www.ozblog.me and click “Sign up for free hosting”.
When they ask for username, this will be your subdomain name, if you choose “example” then your URL will be www.example.ozblog.me
Once you’re signed up, go to http://cpanel.ozblog.me and log in to VistaPanel, then click on “File Manager” then go to htdocs, this is your webroot where all the models get uploaded to. once in that directory, click “Upload” at the top, and browse to the model to be uploaded. And click the blue check.
And remember the 2 URLs we have to work with, the cPanel one for uploading to the webserver, and the one that you registered www.example.ozblog.me is the url to use in hifi to call the models in.
If you need any more help ask away.