How Can I Verify Maintenance Costs Using Actual Past Bills Rather Than Estimates?

Yes — for a realistic budget you should review actual historical bills rather than sums the seller quotes. Ask the seller or management for copies of past invoices for utilities (electricity, water, internet), property maintenance (garden, pool, pond, pest control), security, cleaning and any management or rental commissions. Look for a month-by-month breakdown and notes on seasonality. If available, request several years of bills to spot trends and identify spikes (for example, high AC usage in hot months). Compare those figures to the current HOA budget or management-fee statements to see if there have been reserves set aside for big-ticket items like roof or repainting. Finally, have an independent Thai lawyer or accountant sanity-check the numbers and confirm what will actually be payable after transfer, including any tax or insurance implications. This helps you model a conservative cash flow rather than relying on optimistic estimates.