Presuming your "mobility" needs are more about fun and convenience than serious workload, that's what I would do. Get a quality workstation for a low price and then whatever laptop would be capable enough. A higher-end laptop would likely cost more than a "workstation + convenient laptop".
Speaking of "higher-end laptops"... my wife works at a university. All of the "educators" simply must have a Mac, you understand. So she bought one too. I thought it would be a bit more than the Windows version @~$1,300. But when she told me she paid $4,000 I was floored. She's had it a while... complains about it often... says she'll get a Windows one next time. As for me, I have a workstation laptop which I use occasionally. It retailed for >$3,000 when new. I bought it off lease for $475. Difficult to justify the high price of some laptops.)