On the ground
Production
The shoot is the part everybody prepares for. The paperwork around it is the part that decides whether the shoot happens.
Permits
Filming in public in most of the region requires written permission, and the request has to name locations, dates and equipment. Vague applications are returned, not refused, which costs another cycle. Apply with a specific plan even if the plan will change.
Drone work is a separate application almost everywhere and is refused near airports, military sites and much of the coastline. Budget for the possibility that it will not be granted at all.
Crew
Rates are quoted per day, and the day is longer than you expect. Agree overtime terms in writing before the first day, not after the third — this is the single most common source of dispute on small productions.
Equipment
Rental houses exist in the main cities and are good. Bringing kit across a border is possible but requires a carnet, and a carnet takes longer to obtain than the shoot takes to schedule. Renting locally is almost always cheaper than the paperwork of not renting locally.
Payment questions — deposits, foreign transfers, paying a crew that has no bank account — are covered in getting paid.