I am assuming this would be a monthly challenge, since the annual challenge is... well... I don't know what it is at the moment.

I am also assuming that since many of those who have expressed an interest are only able to take part in 'Challenges' (having already won 3 Lite Challenges, or at least one Challenge already) that if it was chosen it would be more likely to be a Challenge, than a Lite Challenge.

Mapping an entire city is a big commitment. That's why I included the 'part of' clause. You could do just the centre... or maybe just Bogie's House of Horrors, or Robbie's Secret Retreat, in the midst of whatever enclave you imagine such establishments would be part of