If you transfer all the live rocks, then the existing tank will crashed if you don’t have enough bacteria to break down ammonia... (Unless you got many biohome/bacteria house)
so back to square one... why not wait 1 month + for the bacteria to cultivate and enjoy in the long run then putting all livestock together one shot and let it die 1 by one (not saying it definitely will, but the possibility is higher)
this is what i think,suggestion to you and HTH