Nights and weekends - gotta keep the bread winner 9-5 ver
Good call! Supplement the income for a while and then if the business is there and you decide to go that route, expand it to full time.
I am sure that you have already done this but there are some nice tax breaks involved with owning your own business (especially one that also happens to be your hobby

) that you should check out. You will get to start writing off all of your toys