If you like tinkering and figuring things out, then you will love it. There are lots of resources to help you, on this board and elsewhere. If you didn't like tinkering, it might be cost prohibitive to have it serviced in a shop. And I've heard that SM shops sometimes mess up old machines.
I don't know about heat and the crazing. I don't have enough experience to know, but the machine has been protected for decades in that case, and it's possible that the clear coat is gone in places and the decals might wear off as you use it. I'm just talking out of my hat on that. The decals might last a lifetime. You could use this machine with a hand crank and a motor. If your power goes out, you can take off the motor and put on the hand crank and sew. It just takes a screwdriver and a couple of minutes. You can take it camping or sew outside on nice day. It is more challenging to sew with one hand while cranking with the other, though. Good luck! --Sheila