a good (but not exceptional) character model could take about two weeks of 8-hour days. A detailed prop like a futuristic gun, something along those lines could take up to a week of 8-hour days.
a typical freelance sculptor, depending on their speed and experience, could charge anywhere from 60 to 150 USD per hour. Keep in mind that the more experienced the artist, the faster they can get things done, but the more they will charge. And conversely, the cheaper the artist, the less experienced they are, and the more potential for slipped deadlines or longer estimates. Shop around and you should be able to find what you’re looking for, just keep in mind that you will get what you pay for.
also- if freelance artists seem like they’re expensive take a few things into consideration:
- they are responsible for their own taxes
- they pay their own insurance
- they pay any federal programs such as medicare, social security, etc.
what you get for this higher price is:
- ultimately you save money by working on a per-project basis by not having to keep an artist ‘on retainer’ by paying them a more stable (yet much lower) income.
- not having to pay insurance
- not having to pay federal programs or taxes.
good luck!