Scripts

Okay, you can build structures at the moment you capture a castle. Or, you can build them initially and reset the growth in 1 day of the week using a trigger for the new day (but you'll have to do the first reset manually). Something like this:

for i = 16, 28, 2 do
  local count = GetObjectDwellingCreatures('houseInferno', i)
  if count ~= - 1 then
    SetObjectDwellingCreatures('houseInferno', i, 0)
  end
end

function NewDay()
  if GetDate(DAY_OF_WEEK) == 1 then
     for i = 16, 28, 2 do
       local count = GetObjectDwellingCreatures('houseInferno', i)
       if count ~= - 1 then
         SetObjectDwellingCreatures('houseInferno', i, 0)
       end
     end
  end
end

Trigger(NEW_DAY_TRIGGER, 'NewDay')