Could the venue be step-free and close to a station with more than one transport option? Accessibility details are often left until after booking. I’m less convinced about a live remote component: unless the room and format support it properly, it can distract from the in-person discussion...
I would not jump straight to PLN 16,190 just because that is the asking level. Work out what even one vacant month, preparation and finding a replacement would cost, then compare that with the extra annual rent. A reliable tenant has measurable value. A moderate increase, explained early and...