budetowego
Budetowego is not a standard word in Polish and is generally considered a misspelling or a nonstandard variant of budżetowego, the genitive singular form of budżetowy, an adjective meaning budget-related or related to a budget.
In standard Polish, the adjective budżetowy derives from budżet. Its masculine nominative singular is budżetowy, feminine
The form budetowego would most likely arise from removing the diacritic ż (as in budżetowego becoming budetowego).
Usage guidance: when writing in correct Polish, use budżetowego for the genitive singular. If you encounter