I've been working remotely for international clients for the past 3 years, and it's been fantastic. The key is building a solid portfolio and establishing good communication with clients. There are quite a few opportunities for remote exterior work, especially with European and North American studios. I actually found my current position through a job board that specializes in CG work - https://cgaward.com.ua/work.html. They have several remote exterior artist positions listed, including some with Ukrainian studios that work with international clients.