Having read the replies and seeing how you describe your interest and budget, I would suggest considering getting a Push and some other MIDI controllers and focusing on Ableton and Max for Live for now And I’m pretty well down the eurorack rabbit hole already, so I’m not a hardware naysayer.
My thinking is that you already have a very powerful and flexible vehicle for playing and manipulating samples, and lots at a time. What modular would give you that a laptop can’t is hands on control, and the immediacy of manually making connections with patch cables, and not having to look at a screen. That is awesome, but good knobby midi controllers can get you very far down the road, and there is no costs for cases, power, and all the ancillary utility modules you will invariably want for a eurorack system.
Then you can save for a more capable eurorack rig while spending more time researching…
Just a thought, of course.
Enjoy the adventure!