Touring Wadi Shab, sinkhole and Ras al Jinz

I am new in muscat and i have 3 friends coming to visit me and i want to take the opportunity to discover Oman with them.

After much reading : i like to do the Wadi Shab excursion and visiting Bamah sink hole and then overnight at Jas al jinz for turtle viewing and sight seeing in Sur.

I wouldn't dare drive myself, nor my friends. I checked with 2 companies and was quoted between OMR Protected content OMR Protected content person for this 2 days 1 nite excursion, which we feel is very expensive.

Has anyone recommend a more economical way to do these excursions? Any input will be appreciated.