Fixed for accuracy. Speaking from experience, it's nowhere near as bad as "ruining your life".
- You might find it slightly more difficult to pass credit checks for renting.
- You might be unable to get a "normal" bank account for the first year or 2.
- You might find your car insurance increases quite a bit.
- You probably won't be able to get any kind of credit for the first 2-3 years (other than the really high interest cards e.g. Capital One/Vanquis, or rip-you-off companies like BrightHouse).
- You will be unlikely to get a mortgage for the first few years, and will be limited in choice for a few years after that until it drops off your credit report.
Not that I'm by any means encouraging the OP to do this. That £190/month probably isn't going to make a massive difference in reality, and he has the option to stay with his parents which will cut his outgoings massively.
Personally in the OP's position, I'd be living at the parents whilst paying off the loan ASAP and then saving as much as possible with a view to buy somewhere.
What is the situation with your ex/son's accommodation? Are you still paying her rent/mortgage as well as the maintenance?