Yes, if you can't afford organic produce, you can still enjoy great health. If you can't buy organic produce, I would still encourage you to buy non-organic fruits and vegetables and enjoy a full array of different types.
However, I'd also recommend taking some additional steps with the non-organic produce that you purchase. It would be important to wash your non-organic fruit and vegetables well, using a natural bristle brush to lightly scrub the surface, so that you can remove some of the pesticide residues that may be present.
You may also want to peel conventionally grown cucumbers, eggplant, potatoes, and apples. This peeling recommendation is due to two factors. First, the outermost surfaces of fruits and vegetables may be the most affected by pesticide spraying. Second, the above types of produce often have petroleum-based wax coatings that may work against your best health. (The situation with the peeling of non-organic produce is exactly opposite from the situation with organic fruits and vegetables. With organic produce, you almost always want to keep the peels and skins intact because they are among the most nutrient-rich parts of any food.)
Do you have a farmer's market near you? If so, you may want to buy your produce there. Even if the produce you find there is not certified organic, chances are that it may contain less pesticide residues than produce available in larger grocery stores that do not focus on locally grown foods. Many small farmers don't go through the process of organic certification but still grow their produce with minimal, if any, agricultural chemicals.