Economizer

On average, it's definitely more expensive, but if you're not going for the best of the best, then you can build a strong SFF PC at a reasonable price.

A lot of SFF cases (<20L) are enthusiast, boutique cases like the FormD T1 ($265 USD w/o tax), but there have been more mainstream cases like the Cooler Master NR200, Fractal Design Terra, Fractal Design Ridge, and more that are around the $100 USD mark.

Mobo options are limited compared to your usual ATX options and don't get discounted anywhere as much, so if you want a specific one with a lot of features, you'll have to pay up.

Then, SFX PSUs have their own SFF tax for being small. Depending on the size of your case, you'll want custom PSU cables that are shorter than the stock cables.

Everything else is about the same, except you have more limited choices to buy from.

Because the dev now works at Google, he had to remove the root hiding functions called SU Hide. You can bring it back with various modules, but I was lazy and wanted a install one, do all solution.

Magisk Delta is a fork that brings back SU Hide, and I haven't needed to install an extra app to fix any apps it couldn't hide root from.

I use Magisk Delta (a fork of Magisk) on an otherwise stock Pixel 7 Pro. Everything works including banking apps and Google Pay.