As questions swirl about whether Tesla will go private — and the well-being of CEO Elon Musk — one crucial factor looms large over the fate of the Palo Alto company: Tesla’s own financial health. The company has undertaken drastic measures as it seeks profitability, cutting costs and even erecting a tent-covered third assembly line at its manufacturing plant. But many of those tactics may not be sustainable for long, and some could even hurt the company down the road.