booking plugin - complex

combinations of google map infos(distance and time), calendar (dates), and time. playing all together filtering a availability for booking. browse the [login to view URL], I just want to improve it. *first come first serve basis * 8 days booking advance *visitor can book anytime, giving a 3 time options *30 minutes contact duration per Costumer *visitor connects to next visitor if less than 40 minutes away base on google map information. *least travel distance is 60 minutes if towards red pin, if not towards red pin 40 minutes *monday to Sunday booking, but must have admin calendar for availability some explanation below: base on google information of these sample post code; NN69LY - NN155BL , 21 minutes distance NN155BL - NN73AL, 38 minutes distance NN73AL - MK65LQ, 29 minutes distance MK65LQ - HP270RA, 57 minutes distance If visitor1(NN155BL), booked at 10am Monday, visitor2(NN73AL), can book same date Monday by 1130am, since distance is 38 minutes. *visitor connects to next visitor if less than 40 minutes away base on google map. *30 minutes duration per Costumer Visitor3(NN69LY), can book at 9am same date. because it is 21 minutes to visitor1(NN155BL) Visitor4(MK65LQ), can book 1230pm at same date. Visitor5(HP270RA), obviously can book by 2pm, since the travel time is 57 minutes *least travel distance is 60 minutes if towards red pin, if not towards red pin 40 minutes And so on...