Can anybody tell me how long it takes to begin and complete Edwin's quest? I've never paid attention

. But this time there is Keldorn in my party and I intend to pick up Edwin to do his rather funny quest. The problem is, as you understand, that I'm just not sure whether Edwin can live long enoght to complete the quest having Keldorn near.
So, what is your opinion - are we able to deal with Edwin's task having both of them in the party? They begin to quarrel pretty soon

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Sincerely Yours,
Tanda