not good timing with the turbo, all workshops, in fact all tradies full stop are booked for months so good luck getting it sorted in time, it might be a blessing and push the trip back a bit to let WA wake up to reality and join the rest of the country again.
As far as completing major repairs and mods right before a big trip no way would I do that, I don't have that much faith in mechanics so always get work done at least a month or so before a trip so it gives me time to drive it and check their work so nothing falls off while away