i budget fairly stringently- i quilt for others to help support my 'habit' i do not get into the household budget for my hobby- i do what i can to make extra- pick up an extra shift- sell something, do consignments, and quilt- all make it possible to keep stocked and happy
i also keep every receipt and keep close (tabs) on my spending- and if i find i really went over board one year- i assess why and work on (fixing) that.