I’m in the same boat, but I’m not giving up on my wallet, it’s much less than yours but still too much for me to just let go.
RE: “I don't have the time to bruteforce it (maybe it will take years) “
Last bruteforce estimation I looked at with the full character set required was 27,000 years. That is to say if the password was randomly generated you’ve got buckley’s chance.
But if as you say “It is a phrase with words, so not just random symbols” and you think you know part of the password or its potential components it there’s a couple of programs you can compile (I did it and my experience using terminal and coding is rudimentary at best) which while limited in their scope can still do quite a lot.
A Brief summary of my experience….Walletrecoveryservices.comDecided I would try Dave from walletrecoveryservices as there is plenty of people who vouch for him.
I only had one potential password candidate at this point and to this day I'm still uncomfortable that I sent my wallet file off.
Other than these guys I wouldn’t recommend handing my wallet over to a third party.
Pyethrecover https://github.com/ryepdx/pyethrecoverGreat for my sanity if not much else, instead of fretting whether I was repeating a password attempt or forgetting a possibility I just thought of. This lets you just save all your password possibilities in one text file and test them.
Ethcrackerhttps://github.com/lexansoft/ethcrackerThis is what I’m working with currently, lets you test a file with password components e.g if you think your password had say 3 parts…
Say one of cat ,dog, or fish,
and one of 123 345 or 567,
and one of @ $ or !
It will try every combination of those components. Cat123@, 345!dog etc etc
CPU only, so takes my setup about 24 hours to run through about 45 million passwords.
Walletrecoveryhttps://github.com/prabhatsharma/walletrecoveryHaven’t tried this one yet, but it's next! lets you test up to 4 wildcards with your password guesses.
Hope I've encouraged you to have a crack at it...feel free to PM if you have any questions!