My poor mom can sympathize. She spent many years tilling, hauling goat barn compost, and rabbit compost to improve the soil of their garden. While they had the critters to provide manure, the garden did really well. Once they got rid of the critters, and used commercial soil improvements, it started to go downhill.@honanbm Do I garden, interesting question? I have tried without great success to grow both flowers and vegetables but the soil is a combo of thin topsoil on top of sandy gravel. Provides great drainage but that is a two way street. Gravel of course is not "fertile ground".
As part of the coop build I had to move a load of topsoil that has been here for 20 years and also anticipate where I would dispose of the coop and run bedding excess. I therefore built the 1st of multiple raised gardens (12' by 6') and moved the topsoil to fill it (12+" deep); my sister emptied my compost box and then acquired a load of manure that she dug into the topsoil. She then planted arugula and garlic cloves as a test of how well the bed will perform. Plan is to move any coop/run waste to a composing area for six months then use it on the beds. Fingers crossed that this will solve my poor soil conditions.
Your system sounds great! The compost will help, especially using raised beds. I'd love to hear how your garlic does — mine loves rich, composted soil. I once grew a small bed in bird compost alone. The heads were enormous.