A payment-plan ratio is a starting point for your research. Ask for the full dated schedule so you can compare the booking payment, construction instalments and amount due at handover.
Compare the amounts and timing against your own budget. Include the fees that apply to the specific purchase, and ask the advisor to identify what is included in the quoted price.
Confirm the current schedule with the developer before making a decision. A published guide price is not a live reservation: request a current quotation for the selected unit.
Bring your questions.
A conversation can help you identify the project documents and information to request next.