i owned 5 jailbreak in my ps3 life. Actually the cheaper way t is to find someone to hack it for you. Around 50 Can$
You can also look at Modchipcentral. Its a canada retailers of the device needed to downgrade your console. (100$ around the dongle)
If you dont have knowledge in soldering, you may need to check videos and intructions further.
When its downgraded. You may go Rebug Dex. Homebrew, backup, online possible etc (and mod!)