Upload & Sell: Off
I shoot film pretty much exclusively and after scanning stuff myself and trying various low cost options my suggestion is this: try something a bit more high end, someone like the FINDlab. With film+process+scan you're into $1/shot territory but the end result can really be jaw dropping. Not that you can't get good results with scanning yourself but colour is a b!tch to scan right, it will take you lots of time and effort to work it out and you'll still spend 1-2 hours scanning 36 shots while these labs can work wonders which you never thought can be achieved.
You should at least send a couple of rolls to try such a lab out even if you decide the cost is too high. It is helpful anyway as you will know what is possible and have a target for your own dev/scan. You may even decide that it is more appropriate and worth the cost against digital for certain projects.
By the way I'm talking colour, B&W is a different matter altogether but I don't really shoot B&W.
Just my opinion.