"Worth it?" - financially, no.
"Worth it?" - for the learning effect, if you have never done this sort of thing before - yes.
After getting it as right as is reasonably possible - which for me means in good working condition, not antique fakery - you will have a better understanding of your Lee Enfield. And you will be able to make a more accurate judgement of the next sporter you find - which might be a Mk5 or a 4T. And knowing you have done it yourself is more satisfying than simply handing over more money.
Good luck with your project!
Patrick