I'm not sure I got the right thing. I didn't realize this

I'm not sure I got the right thing. I didn't realize this is 19 dollars a month, not just a one-time thing. I don't think I really need it. I don't need all the extra functions, I just want to give each of my subdomains its own URL but I think that's possible just by editing the permalinks in the site's settings. Is that right? Or is this in no way possible without the plugin?