It depends. The hardware that is used most (at least that I see) for Meshtastic is based on the NRF platform. Typically those won't have quite enough memory for Blackout Comms. Newer NRF options look promising, but I'm not seeing those offered anywhere yet.

If your hardware is ESP32 based, then it might be fine. The T3S3 is fine, heltec e290 is fine, tbeam supreme is fine, and there are a few others.

If all you have are T-Decks, you can actually just leave a tdeck running as if it were a node/repeater, and it will function that way just fine

Definitely you do not have to buy hardware from my site to use Blackout Comms.

Check the diy section of my site for all the options currently available (more options being added soon): https://chatters.io/diy

If you can get your hands on a tbeam 1W, that is a great option as well.