Soaker hose may not work for rain water unless you use a pump to create pressure.
I've been following your threads for a while and it looks like you're going down the same road that I did trying to do everything you see on YouTube. For me it was all interesting but took me in too many directions and I've been backing off a lot of what I was doing. I started with aquaponics then hydroponics, worms, raised beds, wicking beds, Back to Eden. The list goes on. I have tried to back off on things that take a lot of time and labor like composting and firewood. I really like the wicking beds because I feel I have total control.