Complex sentence: Their start on life in Bucharest was a tumultuous one, having arrived in this foreign country without speaking the language and with no money, but because of Mikhail's hard work and determination, their circumstances eventually started to look up.
Split into simpler sentences: Their start on life in Bucharest was a tumultuous one, having arrived in this foreign country without speaking the language and with no money. But with Mikhail's hard work and determination their circumstances eventually started to look up.