Electrical load monitoring is critical – and best avoided during winter months when it’s generally under peak load. If the electrics, distribution boards, circuit breakers etc are to code, the lot power board to the lot should always trip first and incur no issue to other lots. Older non-retrospective electrics should be fine providing all appliances (@max load) doesn’t occur simultaneously. Understanding the lot breakers is paramount. If the ‘mother’ incoming breaker trips, there a far greater issues.
Aircon / HVAC should for many lots be an individually lot management / cost issue. Unless the services have been centralised for the building.
Quite simply, if the lot electrics suffice, provide for / are to code (even retrospectively) the issues of power should solely be a lot issue and to pay for.