Based on strictly what you wrote..
You seem like you do not have your own family yet.
Your family takes the dog, i would take the job that i dreamed of. 18 months will go so quick, and we are talking about your "dream job".
I would suggest you move to a less expensive place, still decent, because you will not be using it too much.
I once worked very far from where I was originally from. I kept the place when I moved. So i had two apartments and that lasted about... 18 months.
At the end, i did regret that I indeed "wasted" money for having two places. At that time, i was going to make more than twice of what I was making and it was more than enough to keep both places, have more cars, and the money was still piling up.
BUT, i could have saved even more if i was smart enough to give up on the old place.
Well, this is going somewhere else now lol so i will wrap up.
I mean, you get the point: what are you waiting for. Go get the job
Congratulations btw.