I have a sump plug
connected via hose to a pump .
(similar to above posts)
The pump is mounted in a convenient place,
For me this is on the engine
Connect pump to 5lt oil container via short hose
You could mount pump any place that works
But keep hose as short as possible. (Mine
Is 500mm long & 300 above) not too high above
Fittings and pump will cost about the same as
a vacuum pump, with no storage
Access to do it may be an issue for some.
This works well for me.