For that price you could get some beefy Nvidia GPUs or a lot of cloud credits, but the unified memory and nice laptop are a real bonus.
I've been off Mac's for ten years since OSX started driving me crazy, but I've been strongly considering picking up the latest Mac Mini as a poor man's version of what you're talking about. For €1k you can get an M4 with 32GiB of unified ram, of an M4 pro with 64GiB for €2k which is a bit more affordable.
If you shucked the cheap ones into your rack you could have a very hefty little Beowulf cluster for the price of that MBP.