If you’re serious, this youtuber built a robotic arm himself: https://youtube.com/playlist?list=PL4njCTv7IRbyf3XfhUcp_jnkRrAu1UP3I https://youtube.com/playlist?

If you’re serious, this youtuber built a robotic arm himself: https://youtube.com/playlist?list=PL4njCTv7IRbyf3XfhUcp_jnkRrAu1UP3I https://youtube.com/playlist?list=PL4njCTv7IRbyf3XfhUcp_jnkR... Don’t think it’s cheap nor a “platform” but maybe it’s enough to get you started ;) He just recently put out a video on making a carbon fiber arm piece for it.