K10 Vs M10 -> Local LLM on Raspberry Pi -> Need advice

I'm doing a rapid prototyping and robotics class, nothing too serious, and for my final project I had plans on using the M10 as a communication device, communicating to a raspberry pi running a localized LLM that can answer questions as well as move a robotic arm. I have the LLM fine-tuned, but, I received my M10 today, and, apparently I was racing when reading about them, because it seems to be a pain to setup a rechargable battery, there's no speaker, and I just don't know. I mostly want the unihiker to just be a gateway to communicate to the raspberry pi, I'm also going to attach a Oxygen and heartrate sensor to the unihiker to pull data and send to the LLM. Does anyone have any recommendations on this project and how to set it up with the unihiker? Would it be worth just ordering the K10 and using that? That seems like the better board at this point as I've seen people use it with Deepseek for voice communication, and a few other things that seem to fit the project perfectly. The M10 although maybe more powerful, seems like it doesn't actually have anything I need. Just looking for some advice and maybe tips. Thank you!