VoronDesign

Not OP, and this thread is three weeks old, but I would estimate somewhere around 20-40 hours for your first build. I've been... very slowly... working on my 2.4 for just about the past two months. But most days I don't work on it at all and when I do I'm lucky to get 1.5 hours of time.

I've basically completed assembly, other than attaching the panels. On the to-do list are tensioning belts, setting up my klipper, and then tuning.

If you have the time, and an all metal hot end, you can also print your parts on basically any printer. I printed mine on a reasonably stock i3 clone.