You can easily stay short tesla for a decade. It'll cost you 0.25% APR to borrow the stock from Interactive Brokers. From moment to moment, their system calculates your maintenance margin requirement. For tesla stock, this will be about half the size of your short. When your maintenance margin requirement is higher than the balance on your account, it starts liquidating your positions to fix that. So you need to have enough money in your account and hope that one of your short positions doesn't get big enough to force a liquidation. Liquidation is only costly when you have to cross a big bid-ask spread, but that won't be a problem for a large cap stock like Tesla, so in expectation the risk of liquidation isn't costing you much.
You can easily stay short tesla for a decade. It'll cost you 0.25% APR to borrow the stock from Interactive Brokers. From moment to moment, their system calculates your maintenance margin requirement. For tesla stock, this will be about half the size of your short. When your maintenance margin requirement is higher than the balance on your account, it starts liquidating your positions to fix that. So you need to have enough money in your account and hope that one of your short positions doesn't get big enough to force a liquidation. Liquidation is only costly when you have to cross a big bid-ask spread, but that won't be a problem for a large cap stock like Tesla, so in expectation the risk of liquidation isn't costing you much.