Do it yourself = FREE
(apart from having to buy/hire spring clamps)
There are plenty of guides around on the internet to help you.
The skills you learn will help you for years.. the more you can do yourself the more you save in the future.
I look at it like this.....
You can either go to a garage and pay them £50 (£150 for job) or more an hour which you have to work how many hours to pay for ?
Or you and a friend or two spend a Saturday doing the job, have fun, learn and save money
J