How to handle remote work red tape in the USA?

My company is expanding our 100% remote work model into the USA. We currently employ dozens of developers and administration staff across Australia and New Zealand with a couple in the USA through our USA c-corp. But in the USA it seems we have to produce unique contracts / employee handbooks et al for every city and sometimes suburb in those cities to comply with local laws, as their place of work is their home office. If employees never moved, this could be acceptable, but (rightly) they do. How do USA companies (and I'm talking companies without dedicated legal teams) handle this massive compliance requirement? I haven't found a legal team yet who are savvy in this 100% remote work model and would appreciate any recommendations.