options for cheap organic fertilizer sans composting?

[unless]

greetings to all.

i have an extensive, organic sip/earthtainer-type container garden. a price increase on my stalwart fertilizer from espoma (garden-tone) from $25 to $30 per 40 lb bag has me brainstorming for cheaper alternatives to satiate my plantaloons' hunger. i have also been supplementing with bottled liquid fish & kelp, but that is pricier these days too.

might you be able to help me out? note that i'm looking for container-viable options.

the catch is that i don't want to undertake any kind of composting endeavor. i don't have the time or requisite facilities; besides, i would need a fairly big operation going to produce enough food for my many plantaloons.

i have sourced free dried rabbit manure. is that a good subsitute? i'm assuming it's not nearly as well-rounded in composition as espoma's mix (which is primarily feather meal and chicken poop), so what other cheapo amendments might i consider adding? also, can i make a good tea with it?

what about alfalfa meal? that is pretty cheap at feed stores. thoughts?

another adjunct treatment i'm considering is my own urine. is this disgusting, or brilliant? would i need to let it air out before applying, or can i just pee directly into the reservoir tube?

my biggest concern is making something to cover all nutritional bases. my own urine, for instance, don't come with an n-p-k rating. espoma does, so i know exactly what i'm getting.

thx & cheers