I have been pondering using an e-cigarette for some time, but never tried it (I do not smoke) to go out and buy to experiment. Thank you for doing this! It helped me a lot.
Buy an e-cigarette and disassemble it. The structure is simple and there are many videos using electronic cigarettes on RU-vid, so it is easy to learn.
They can put out a lot of smoke. Just problem is how they work. New coils use ceramic but require larger wattage. Smoke generators have been around forever.. I’ve never I used now for one reason. Unrealistic smoke color. If there was an ingenious person that could figure out how to produce black smoke with one..