There is a way around this, but it is board driven: a group buy is arranged and the entire building is done at once. The board or a GC they hire subs out the work and coordinates order of operations, and uses known good contractors from references. It’s for sure a coordination challenge, but it can be done if the will is there and residents are friendly to collaboration. Otherwise, it’s just pain (having coordinated electrification refits for ~50 unit buildings).