I used to have fortnightly and changed it to monthly could not keep up with the fortnightly once the winter came in
monthly if you go a week behind - on a 4 weekly basis you are still within the month as some months have 5 weeks
going fortnightly your run will build up quick then you have a delemma do i take on staff, you might say =yes once i get enough then i will stop taken on new customers, but a window cleaning business is alive and you are allways growing if you want it or not
jinky