Hola from Michoacan
I've been free diving for 53 years and spearfishing for 40 of that. I currently live in Mexico and mostly dive solo in Northern Michoacan. My choice is not to dive alone, but as I am the only one around i don't let that stop me. Because I am usually solo, I limit my depth and dive times, and have passed up numerous shots at fish I though might hole up to deep.
Puerto Vallarta and Punta Mita are fairly close to me, but I have not been as yet. Anyone venturing south that needs a partner, let me know.
Scott