By no means am I the best to answer this but I’ll take a shot as its Christmas / quiet forums.
BTW1: This comes up in loads of other threads, so it may be quicker to search than wait.
BTW2: Where are you based / show us some representative game character samples etc…
Anyway, I won’t look to other threads, I’ll see if I can go on gut and come up with something.
Ten is such a large number of characters that I don’t think many modelers will do fixed price.
Lets say you’re US / EU based, modelers will probably want something like $30 an hour min…
Lets say it’ll take 10 hours to create each core character plus 10 more for anims / revisions.
Picking 10 because it’d probably take me 20, 30 or even 40 as a non-modeler to get it done.
That’s $600 USD for each character or 6 grand for the whole set, as a min guesstimate…
But it could be 10k if there’s lot of revisions because characters generally need tweaking!
However, if you could outsource this to India / China / Latam, it might only cost $2-4k etc.
Also if you have skills to trade, you’re a coder or whatever, you can barter these rates away.