I am going to have my standing rigging and lifelines replaced this spring. I decided to pay a professional to do this for three reasons:
1. I am not particularly talented mechanicly.
2. If I screw up the standing rigging and it lets go in a blow, I am looking at a $10,000.00 repair job to replace a bunch of stuff.
3. If I mess up the lifelines and my wife goes overboard, I am looking at an even more expensive divorce.
I guess it depends on your level of confidence in your skills and your ability to accept the possibility that doing it yourself can cause injury, death or result in spending even more money fixing the things that got broken as a result of your work. If a pro dose it at least you can sue the SOB.