If we are so worried about prices of commodities like food going up, why don't we plant our own food, make a self sustaining garden to meet the daily needs, it can greatly cut your expenses because you don't need a lot of things to buy when you go to the market. I don't know the reason for your country to import tomatoes but maybe there is a shortage in the local supply or your country has an agreement with the other countries regarding imports.
The idea is good, but obviously there are limitations. You can grow crops such as tomatoes, chilies and lettuce in home gardens. But they require a lot of time and effort and constant upkeep. That means you can't take vacations of more than two days, or else the plants would die from lack of water. I have seen some of the friends trying their luck with home gardens, but they had only limited success. Apart from the huge time and effort requirement, there is also the issue with pests. And first of all, you need enough space in your terrace or balcony to grow these crops.