There’s an option for a tented middle layer but it’s definitely a little jank. https://docs.keeb.io/tenting-bolts-setup

I’m a fan of the keebio Iris keyboard. They have a prebuilt version and you can disconnect the right side.

I’ve used Free Tax USA in the past, but I wouldn’t say they’re trustworthy. They’re still part of the free file alliance and actively lobby against the IRS creating their own free tool without any restrictions.

I’m a big fan of my OLKB kit. Hotswap, very solid case, and QMK compatible (which is a big deal for 40% boards), but the kit is a little expensive.

I don’t have one personally but the YMDK kit on AliExpress seems like a good option and is cheaper. Just know that it will take a month or two to ship from China if you’re in the US.