For the least complicated setup, I agree with those above with a nice deep water setup. A bucket, a net pot that will sit directly in the bucket, an air pump, some airline tubing and an airstone....voila...hydro.

Mistakes I made when first starting: I didn't have any testing equipment (TDS, etc) and I left the old water in way too long. Change your water weekly (with aged water) if possible, certainly every 10 days. You wouldn't believe how fast those salts will build up on you.... Testing your TDS, pH, etc. will save you A LOT of grief in the long-run. You don't have to have it with this setup since you are replacing the water regularly, but testing equipment should save you a little in nutes, anyway.

Heat was also a huge isse for me (I have a similar setup). Move that air with a blower. If you aren't as worried about stealth (sound from the blower) and if you aren't using CO2, I would shoot to turn the air in the cab 8 - 20 times per minute.

My 400W is difficult to control the heat due to space limitations on my part, so I have switched to a 250w HPS. Limited yield, but everyone stays happy....

I control smell with a homemade carbon scrubber (instructions are on this site somewhere, but I've slept since then...:stoned and Ona Gel. Works great, and keeps the smell confined great! Budget setup, but works really well. Good luck, and keep us posted!