Manure here is used after it "matured" meaning three months for that coming from cattle and six for horses. Never had a problem with mature manure.
Rabbit manure is the only one that can be used "as is" because it's a cold one. But I don't keep rabbits: I've eaten so many connies when I was a boy the mere mention of the name causes me nausea.
I make my own compost, but it's not only never enough but I suspect, being mostly vegetable matter, it's not that great to start with. I mostly use it for ornamentals with low fertilizer requirements now.
Not a big fan of soil replacement and given my vegetable patch is terraced it would mean a lot of back breaking work for little reward: better to improve things a bit at a time and hope I'll be able to move away from here.
sounds like a gardening challenge! but if you are on terrace, perhaps you have to very nice views to help compensate... regarding fertilizers, do you have 'feed n seed' stores there where u can get it? gardening centers? 13-13-13... of course, it is real good stuff, but not a substitute for good, friable soil... are you located near or in a large city or town?