> but I wonder what others I could use that aren’t as expensive.
An Ender3 is basically the same size print volume: Its like a few mm different. For hundreds of dollars less. With less price comes less automatic features. No AMS. Its a bed slinger not CoreXY. Not on your Wifi. And you'll have to level the bed manually. After that, its still a nozzle with a hole pushing molten plastic. Amongst all my machines are three Ender3pro that are years old and still putting out customer-grade product: But obviously at a slower speed than a modern era non-bed-slinger.
But any machine in that 250mm³ is still pretty small in the context of armor. Its going to mean lots of seaming. Personally, I'd wait until you can afford something that is a significant improvement over that A1, just not an small incremental step. You can probably get a 400mm bed slinger for less than a P1S, but again it won't be turn-key, know-nothing, fully automatic.