I never really found the 357SIG's to have recoil any worse than warm 9mm. They are a bit louder, but recoil isnt at all bad, and still less than .45acp, which isnt bad either. Of all of them, I still find the .40's to be the snappiest to shoot.
As far as cost goes, it used to be, 357SIG and .40 were pretty much the exact same price. I was paying $250 a case for both right before things went crazy. Ended up selling my unopened cases of 357SIG off for around $450 a case, and at the time, they were heading into the upper $500's. I know things came back down some, but it still looks like 357SIG is about $100+ a case more than .40.
When I first got into it, it wasnt worth the bother to reload for, as it was only costing me a buck more a box to buy by the case. Once the prices started going up, that changed, and I loaded a lot more for it.
Even then though, 357SIG isnt the most economical to reload for, as the bullets are mostly round specific, and usually cost a bit more, and the powder charge is almost three times what I use with 9mm. Bullets were a bit of a challenge to find at times, as there are less choices and they arent as readily available.