Thanks for all the great feedback! The collective wisdom of this forum is pretty amazing. I think I've harvested a few gems from all the replys:

1. Consider the available fuel source more than anything else. No fuel, no power
2. Don't be cheap. Buy a commercial unit that is rated for the task.
3. Don't be greedy or excessively wasteful on the generator size spec. Get buy on as little kw as possible.
4. Use a switch to properly attach to the home electrical system (unless extension cords are sufficient)
5. Buy an 1800rpm unit to keep the noise down.

I can work within these parameters

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1985 300D Turbo California Model (134K)