I've been thinking of doing it myself, since I'm getting a little bit tired of the price to performance ratio of laptops, plus I quite like the idea of having a triple monitor setup to aid with doing work on it. I'm not looking for a full powered gaming computer, this will mainly be a working computer. So, it'll likely be coming out in the field with me, so the weight ratio will have to be decent, and it would need to be semi rugged. I tend to buy rugged computers anyhow due to my life style.
I'm wondering if anyone has any specific security recommendations or thoughts before I commit to building it. If I'm going to do it, I might as well put hardware kill switches on it, and all the bells, and whistles. Then, throughout the years I can stick to this machine, rather than upgrading laptops. The current laptop that I do the majority of my work on is rather old, and quite slow when running Qubes OS, but I'm finding it rather difficult to justify upgrading due to the expense I would need for a rugged modern laptop.
I'm taking a little inspiration from this: https://www.youtube.com/watch?v=dSJZ7MtKe1w although, that's way too big for my liking so I would be looking to downsize quite considerably. Although, he does have quite an interesting video on a battery, which I think I'll be whipping up also. Here's his power station video: https://www.youtube.com/watch?v=dSJZ7MtKe1w
I don't plan on storing Bitcoin on it, so no need to go into that sort of detail. Although, I might think about integrating a Bitcoin node somehow. Haven't given it enough thought yet on how I'd achieve that especially if I wanted to run it 24/7.