Both Singapore and Thailand offer a wide range of accommodation, activities and transportation options that cater to different budgets. Overall, however, Thailand is more affordable than Singapore.
Singapore is known as one of the most expensive cities in the world with the high cost of living and commuting. Accommodation, food, and transportation in Singapore tend to be more expensive than in other Southeast Asian countries, including Thailand.
In contrast, Thailand is often seen as a budget destination, offering a wide range of affordable accommodation, street food, and inexpensive means of transport.
While some tourist areas in Thailand, such as Phuket and Koh Samui, may be more expensive, there are still plenty of affordable destinations around the country.
All in all, if you're looking for a more affordable trip, Thailand would probably be a better choice. However, it's important to note that your individual costs may vary depending on your travel style, the specific destinations you choose, and the time of year you visit.