That's definitely something to consider.
Here, nightcrawlers are about $2 and some change for a cup of 24. And crickets just depends on where you buy them from.
I'd have to have silkworms and hornworms shipped in which would be very expensive. And right now, my pixie is maybe the size of a 50 cent piece.
Once s/he gets bigger I may look into hornworms if s/he still isn't accepting night crawlers.