I can see that Sauzo.. F/T is just the best option (for me) and if from a good source, is pretty close to fresh IMO. I am going to start breeding my own feeders soon and plan to do some f/k, but will likely keep doing f/t for the majority of meals (I will CO2 in batches, feed the fresh killed that night, then freeze / save the excess for later use).
I felt terrible the first time I tried CD.. and I failed trying it on a small rat (probably slightly older than weaned.. had mega colon and had to be put down). After that incident, I decided CO2 was the only way for me.. It is not cheap though.
If the OP has someone to show her (in person) how to do CD, then it might be a good option though.