1.9 xr2 on 40's

wondering whats a reasonable price to pay for a complete set of covers for rebuilding a recaros interior? wether it be leather or normal material or even man made

reasoning is my mum is on about getting a 2nd job to help pay for her house build and is a pretty good sewing machinist
i stripped a recaro into its component parts and she was sposed to make me a set of covers but shes apparently not had time
if she could see a reason to get on it i expect she would be able to knock them out pretty quick and as a recaro can be rebuilt in 30 mins top i think it would be good for her to do and people would like it too and have a new interior retrim in a lazy sundays work

any ideas?