Just make sure you have a good understanding of the time and $ commitment here. How much time does she spend crafting? Marketing? Attending shows? Etc. Make sure you are willing and able to do that.
I posted about "Sam" in Jan 2015. He's a guy my dad knows who loaned his ex wife $40k - probably close to his life's savings - to purchase a toiletry business. When I initially made the post I just thought she was starting a business, but she was buying an established one. The exwife got very sick and was in the hospital (she has since passed away) so Sam was having to work his regular job, then go home at night to frantically make soap, lotion, etc to keep the business afloat and try to recoup his loan. Fortunately for him, when it became clear that ex wife wouldn't recover, the original owners purchased the business back.
I'm not sure how much you are paying for this business - and honestly, paying for a list of loyal customers, perhaps some kind of online presence, logo, etc on top of equipment is not a bad investment. Make sure you have some kind of contract if you will be depending on her advice. For example, in Sam's case, the business owned a machine that filled and sealed tea bags. He could NOT figure it out and the former owners had to show him how to use it. Make sure you have all of the recipes that you want, you understand all of the equipment, have all of the paperwork (manuals, warranty info, etc).