What do expats find most challenging?

"Expats often find the process of acclimating to a new culture, language and lifestyle a major challenge. Many expats also find it difficult to build a social network in an unfamiliar place, as well as searching for and settling into a new job. Navigating local bureaucracy and understanding different customs and regulations can be overwhelming. Financial difficulties can be a major concern for expats as they may not have access to expected forms of income, while the cost of living in some countries can be much higher than originally expected," mentioned another expat when asked about moving to Leon, Nicaragua.