you can make it as simple as a drill pump and a couple washing machine hoses ( I did this for years ) It's a happy medium between a manual pump and those pricey electric models..........
Because I like to build things I put together my own little pump station.......I had a old 15 gal keg so I made up a hose adapter to clamp to the keg using a 2" sanitary clamp. Then I soldered a 1/4 flare fitting in the top of the keg, mounted my vacuum pump and keg on a small dolly... roll it over hook up lines turn on vacuum pump and kick back.........made up a couple different adapters and use it on all my vehicles.........
When the keg gets near full I pay my 23 y/o a few bucks to run it to the recycler and dump it.......
