Eh, mine probably would have lasted longer than three years had it not been for the fact that I left it plugged in at home while I was at work... and then we got a storm that ended up blowing the power for a few seconds, but it was enough to short circuit the charging port... INSIDE the laptop :< So there was no way to fix it lol
Honestly, OP, unless you absolutely need the portability, I would go for a desktop computer. Laptops in general don't last long simply because of their infrastructure - you've got a bunch of chips, wires, and tech stuffed into a small space, so they wear down faster due to overheating as a result of the close quarters (and other issues). I'm using a Cintiq Companion 2 which ran me a few grand and I know I have to come to terms with the fact that it's not gonna last me much longer than 3 years. I'm hoping if I treat it right, I can help it last longer, but like a laptop, it's a bunch of tech smushed into a small, flat surface, which isn't ideal for motherboards, CPU's and wiring.
Hell, if you really wanted to save money AND learn a thing or two about computers, I'd even say to just build your own. You can spend your own amount on certain parts without overspending on things you don't need, and most parts are manufactured for building so it's just a matter of googling how to build a computer and fitting all the pieces together like a big mechanical puzzle. You can also have better cooling fans that help keep the parts in good condition, and if a part does break, you can replace the part without having to replace the entire computer from the case and everything inside.
But that's all assuming you don't care if it's portable or not :U If you need it to be portable ... honestly, I wouldn't go for a Mac because fuck Apple, but don't let my jaded opinions stop you if you find a good model that has all the specs you need lol Just so long as you make it last! The worst crime for Apple computers is that they cost an arm and a leg but barely last long enough to make it worth it.