man, I feel ya!
same here... cannot afford buying special treatments... so i always have compost at hand.. in my backyard...
well there can be found californian worm castings for sale (cheap 1 euro package)... but i still prefer to use the service of our local bulgarian worms :) they work slower... but they're homies :D

actually a friend with many gardens and compost beds offered me a handful of worms to take away and meet them with mine... but i forgot to take them :D