Traveling Thailand on $50/day realistic? Where can I stretch baht the most?

Yes, $50/day is very achievable outside Bangkok. Northern Thailand (Chiang Mai, Pai) offers guesthouses for $8-12, street food for $1-2 per meal, and scooter rentals for $5/day. Islands and Bangkok are pricier—expect $70-100/day if you want air-conditioned rooms and dive trips.