well the email said that the job required speed so I interpreted it that 4 hrs meant only 4 hrs...oh well if this doesnt work out Im sure something else will.
The reality is that it depends on you as an artist. There really isn't one but it usually takes longer that in a studio setting since you tend to feel that you are on your own time and not really doing a job. Also it's going to depend on the style. 8 hrs to 10 hrs modeling rigging 3hrs if it's a simple one unwraping 3hrs…