Full Budget Breakdown for a Trip on a Shoestring

A total budget is one thing; knowing whether it survives contact with daily reality is another. Give it the destination, duration, traveller type and total budget, and it builds a daily breakdown across accommodation, food, transport, activities and a contingency buffer, with budget and mid-range tiers. Suits anyone travelling on a fixed pot who wants the numbers to actually hold.

I want to take a {DURATION}-day trip to {DESTINATION} with a total budget of {TOTAL_BUDGET} {CURRENCY}. Travelling as: {TRAVELLER_TYPE} (solo, couple, or group of {GROUP_SIZE}). Build me a realistic daily budget breakdown covering: accommodation (with two tier options -- budget and mid-range), food (street food vs sit-down), local transport, activities and entrance fees, and a contingency buffer. Present it as a table with daily and total costs. Then tell me the top 3 places my budget is most at risk of blowing up, and suggest one trade-off swap for each. Flag any costs that are typically hidden or underestimated by first-time visitors to this destination.