If you can find a place that could give you enough pods to feed him constantly, it might be worth trying. They are literally constant feeders, so they do starve if there isn't food present 100% of the time.
I honestly have not heard of people having long term success keeping one of these creatures in a system as small as yours. For the record, I don't consider 5 months to be long term success, I would consider 3-4 years long term success.
I know that you don't want to hear it, but your best guarantee for a long lived and healthy specimen is to move it to a larger system. Other than that, you'll be in uncharted territory if you get it to live for more than a few months to a year. At which point the community might be able to benefit from you and TCM telling us how you were able to sustain one of these specialized eaters for so long in small tanks with minimal live rock, and no refugium.