The husband and wife behind an ambitious vision of transforming Maine’s forest industry into a fuel- and food-based bioeconomy say they have spent more than $17 million of their own money to refurbish and diversify two ailing wood-fired power plants, are committed to completing the projects, and are working to settle unpaid bills and back taxes. “We’re all in,” said Kimberly Samaha, chief executive officer of Born Global, an entity associated with Stored Solar LLC, which bought the plants in West Enfield and Jonesboro last year. …After declining to answer questions from the media…, the Samahas agreed to be interviewed because they say the coverage omitted some important explanations and they want to send a message to Mainers and potential investors to counter a steady stream of reports about setbacks to their business plans.