إِذَا قَدَرُوا عَلَى الزَّادِ وَالرَّاحِلَةِ
Translation: When they are able to provide journey provisions and transportation.
Al-zād means travel provisions and related costs; al-rāḥilah is a means of transport. In present-day travel these correspond to appropriate legitimate transport arrangements and their costs.
The focus is resources actually available, not anticipated earnings or a wish to travel.