Cost of living? Use of credit or debit cards or is actual money better? 

Cost of living is similar to here in the UK, cards are widely excepted (even in the markets in Petra, stall holders have chip and pin machines). Brreakfast and dinner is included daily so there's only lunch, drinks and souvenirs to account for.

Here's a link to his travel story if you would like a little more info on the experience: https://www.justyou.co.uk/about-us/testimonials/alans-journey-to-jordan/ 

I hope this helps and have a wonderful time!

Just You Team