Considering these pointers in your inquiry will really help us get back to you on a quote right away, and how long the asset will take to produce:

 

- references, concept art, description of your asset

- art style(gritty realistic, kiddy cartoony, expressively stylized) - What is the target polygon resolution of your asset

- texture map size resolution and division of maps/uvspace

- what game engine will it be ported in and its lighting requirements

- How many LODs(level of detail) are needed