Maybe you should arrange to do it at the same time and get temporary rentals somewhere else.
Presumably you're doing a shared wall, but having the plumber or electrician out for two jobs is probably cheaper than having them out twice, right? Especially since there will be similarities in the levels of stupid they find in the walls.
It is a floor/ceiling situation. But the floor as a nice old intricate hardwood floor, and ripping it off would be a shame. Looks like we can do the sound insulation fro the ceiling of the apartment downstairs, but
1. It requires the occupants to vacate
2. It is expensive
3. It is difficult to estimate the change it would actually provide
Presumably you're doing a shared wall, but having the plumber or electrician out for two jobs is probably cheaper than having them out twice, right? Especially since there will be similarities in the levels of stupid they find in the walls.