Regional by default, which changes the architecture
A Singapore company building an operational system is typically building it for Malaysia, Indonesia, Thailand, Vietnam and the Philippines as well. Multiple currencies, multiple tax regimes, multiple languages and quite different payment infrastructure — from the first version, not as a later expansion.
This is the requirement most often underestimated. Currency, locale and tax handling retrofitted into a single-market system is close to a rewrite, because the assumptions leak into the schema. Deciding regional scope before the data model is designed costs a conversation; discovering it afterwards costs a quarter.
Buyers here are also unusually rigorous procedurally. Vendor assessment, data protection review and clear contractual terms are standard even at modest deal sizes, which suits a studio that works from written scopes and finds informal arrangements harder.
Cost per market is a live commercial question rather than an engineering detail. A regional platform that is uneconomic to run in a small market is a platform that will not be launched there, so the infrastructure decisions and the expansion plan are genuinely the same conversation and are best had together.