Those bamboo stakes sound like the really thin ones at that price. They will not work. I used metal garden stakes about 1/2 inch diameter last year and the tomato plants snapped several of them. I do grow tall bamboo and have used 1 inch diameter reeds as stakes, however, is it hard to get the bamboo deep enough into the ground for support, plus you have to rig the poles to catch support string otherwise the tomato just slides down the pole.
What worked for me cheaply was to teepee 3 tall pieces of scrap wood, or tree branches, tie them together at the top and tie up the tomato plant to the top of the teepee. This works is you have free wood or a few tomato plants.

What I've done with my rows of tomato plants is to buy those heavy green flat metal stakes and use them as the end anchors, then just run heavy wire to them. I bought the tall commercial ones about 7 feet tall (6 feet will stick up out of the ground and you would need a ladder to hammer them down into the soil. I got them for $5.00 each at Lowes). I bought a cheap roll of heavy wire for about $6.00. I tie up the tomato plants to the wire using old tee shirt pieces or pantyhose, similar to this photo (this is not my garden)...
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If you are going to be a frugal gardener, you will have to learn to scrounge. Anything can be used for something else. Got a free site in your area available thru the net? Eureka recycling hosts one here and if you are the early bird, you can find something useful for some project.

I have many poles, metal, pvc, wood that I got over the last year. Tent poles from a discarded old canvas tent (they are more sturdy/thicker metal) will hold tomato plants if sunk in the ground and staked close together.

Hay (straw) will work placed on the ground and if some fruit vines are there, it will keep them from rotting on the vine. That in addition to some type of teepeeing or tying like in the pics above.

I put six plants along the edge of my tulip bed, 3 varieties, and I had gotten some 1" six foot tall stakes of hardwood, old, but still useful. I dug good sized holes and filled them with water and then hammered in the stakes. Then placed the plants in deep. I will mulch them and then place two pieces of those stakes across the top and tie rope from those to the plants. I should be able to make them climp whereever I want.

I used discarded lattice pieces last year, nailed to a fence above my containers and just tied them as they grew. Also, I had a 4'x8' piece of lattice and I set it behind four plants and bent it over away from the plants and attached it to a fence. As they grew up and over the lattice supported the vines nicely.

I use wire tomato cages but I drive a sturdy stake in the ground to support the cage and sometimes pieces of chicken wire wrapped around the cage and attached to that stake.

Hope you work something out.

I tried cages and hardware cloth around the plants for a year or two. Many of six types of tomato plants got huge and outgrew their confinement.

Last year and this year I tried something different. I bought four heavy metal three-sides posts like a stop sign would be mounted on. They were about ten feet high, and cost $17 each. Each post was set in a 5 gallon bucket with cement.

The posts should last a long time. Each spring twine is strung up in the holes between two posts, which are about three inches apart. Two rows of tomatoes and peppers are set between two posts about thirty feet apart. The first year several of the lengths broke, but no big deal. The next ball of baling twine will have to be stronger.