From what I can tell, just about everything about bees is money. If you manage to make a second small hive from one of your colonies it is worth about $100 the hive itself full of bees, comb and honey can be worth as much as $1500. the wax sells for several things from candle making to lip balm. You can produce just queens that sell for $20 to $30. The pollen is sold and is good for building up resistance to allergies in your area. You have to eat pollen from local bees for that one. I have the ability to make hives and frames and those sell for around $100 a piece for a full hive. And then of course you can sell the honey if you want to mess with it. Bees equal money and when you start looking into them you figure that one out fast. not even much of the information is easy to get freely. That makes the group I found a real gem. They will tell you right off the bat to expect to spend $600 just starting your first hive. I have spent about 50 so far and have no bees or bee suit, smoker or hive tools. I am maybe a couple hundred dollars away unless I can find a swarm to capture or something.
As for the reason to have bees. "Pollination" Honey bees do a better job of pollinating than any other critter. It is not just a matter of more fruit, but better fruit. many things that visit the flower do so by quickly taking a sip of nectar not always even toughing the blossom and then darting off again. The honey bee lands on the blossom and will sort of dig around in it. Like a child trying to get to the bottom of a toy box. THis results in more complete pollination of the blossom resulting in larger fruit.
It is sort of hard to pick just what is the most valuable thing you can do with something that turns everything into gold. But from what I can tell the best money in bees is placing hives in Pecan orchards. I read one post that said the going rate for a hive in any orchard or filed is $60 a hive and that they would not mess with placing less than 100 hives. That is $6000 to drop off a truck load of boxes. And the hive owner gets the honey, wax, bees and all back in a few months.
My interest in bees is to have them around to keep my garden pollinated. That and I just like them.