Well the good news is that 4 months without food is not something that can't be fixed so long you follow the link provided by Pit, if you set her up in your $500 setup it is very likely that she will continue to refuse feeding, because my guess is that you went with a 30 or 40 gallons breeder tank which will be too big for an animal that size especially one that has issue feeding.

So get her a 6 quarts tub / 12 at the very most and in this case you want to use 2 hides, and offer a live mouse or rat up (not knowing what your snake was eating when it was eating and being so long without food there is a good chance your snake would go for a live rat pup, if it does not work the following week try a live mouse.