Cosmetology? My goodness... what is it? What's a cosmet?

Just kidding... it's hair cutting of course. There's serious money in hair cutting for women. The men don't contribute much to the profits of a cosmeticianally aligned business.

I believe the women spend $2500 to $13,000 annually on their hair.

Setting up a shop to cut/wash hair is fairly straighforward, obtaining customers is not easy as there's so much competition and women can be right beastly when it comes to getting their hair cut JUST RIGHT and it's not done PERFECTLY.

On the plus side:

You get to meet a lot of women... some of whom will be quite wealthy... hmmmm.

Automotive services... yep, good money in that as Gharth said. Better to specialise though instead of doing everything.

You could specialise in fixing/replacing/diagnosing the engine control computers or auto transmissions or indeed adding more electronics into the interior.

Conversion of cars to ethanol or LPG is very profitable in some places.