Brother Holding a Jeep/car/etc for 3-4 days is much costly weather you hire that from ISB or From Balakot.
I think best option is
1. Go to Naran First PTDC Couster service
2. Hire jeep for visit Saif-ul-Malook (2500 appx)
and then Hire a jeep for Shogran/Siri Paye from Naran (4000-5000 from Naran including Fuel)
3. Back to ISB from NARAN
Otherwise personal (own) vehicle is best solution and cheap also