I've spent significant time in HCMC (about 6 months over four years). It is vibrant, friendly, booming, tech heavy, and goddamn cheap. I didn't need medical care, and didn't have to cook because food is amazing and cheap. I computed about 1/10th to 1/12th the cost of my life in Northern Cali. I hope when I'm older it is still cheap and not environmentally wiped out. (I'm also biased because twice I met a woman who I thought was waaaay out of my league and we ended up dating.)