Professional hole driller
I would think any competent handiman, or carpenter, would be able to determine how to drill the hole you need based upon the information you give him regarding: the diameter of the hole, and what he's drilling through. He'll need to know if the area is brick or wood framing with siding, or perhaps face brick to give you an estimate over the phone. He'll want to know how thick the wall is: are there electrical lines perhaps hidden behind drywall, etc - if you have it, or water pipes? Then he'll want to come over and see for himself and do an inspection inside and out.
The James Kervan book "Everything You Wanted to Know About Beads But Were Afraid To Ask" has directions for constructing a vent hood with motor. Maybe your handiman could do that, too. Or buy a good one from somewhere and have him install it with the venting line. I got a cancelled special order hood from Sears that was $100 for $30.00. Sometimes they have them in their back room. Ask.
Good luck. This can be done.
Marianne
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