Any recommendations for budget-friendly accommodations or websites to find good deals on hotels?

Booking .com

Agoda, booking, expedia... i found these most helpful plus they sometimes have "specials, booking code"

Join trip.com and traveloka telegram.. they will share when n where to grab promo codes.

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Enter agoda using credit card links eg agoda.com / dbs. Cart out using the required credit card.

Agoda. Sometimes book directly with the accomodation might be cheaper too