Sposable — Compare options without hiding trade-offs
https://sposable.com/labs/compare-options-clearly/

Alder: €180 + €40 = €220, fits 20 and has confirmed access; it meets the supplied constraints. Birch: €160 + €30 = €190, capacity fits but access is unknown; it is conditional, not confirmed suitable. Cedar: €120 but only 18 seats, so it fails a hard requirement. Alder is the defensible current choice if the quotes cover the required event. Birch could become the cheaper suitable option if access is confirmed. No missing cost should be asserted as either zero or definitely payable.