Similar here with an aircon installer.
SWMBO decided that the veranda had to closed in, so 3 compressors had to be moved.
First the aircon movers were going to run the inverter pipes 2.5 m on top of the veranda tiles. That was a no go for old people.
I said run them in the ceiling. So they were going to run the drainage line from the aircon sump, vertically up 0.3m (with no pump) then 2.5 m horizontally in the ceiling, then 2m down the outside wall.
So that mob were let go. With the next mob we installed 3 pumps on the drain sumps outlets and 5 years later still working OK.