It’s all subjective and based on your personal level of interest. From a technical standpoint the time needed is based on how fast your computer can compile everything, how fast you read and understand the instructions, and how much effort you want to put into it.
Or they’re bored. I’ve done Linux From Scratch before. It’s fun. It’ll teach you a lot about building and maintaining a distro.
Do it. Take a weekend, and indulge yourself.
How long does it reasonably take? Just a weekend?
It’s all subjective and based on your personal level of interest. From a technical standpoint the time needed is based on how fast your computer can compile everything, how fast you read and understand the instructions, and how much effort you want to put into it.
So yeah, a weekend could be reasonable.
One month, got it.