Frugal tomato supports
I'm growing a major expansion of my tomatoes this year. I'm planning to grow nearly 50 plants. All of them will be long, indeterminate vines. I prefer staking or trellising them, but I am finding that supports are getting awfully expensive for so many tomatoes. $5 for a tomato stake is one thing when you're growing ten plants, but quite another for 50. Can anyone suggest a more economical support?