Not only does a woman decided and make purchases, she then invests that acquisition and money to make a profit and expand her productions. She is an active participant in the workings of the economy and how to make the most of whatever she has to work with, great or small.
This is describing good business practices, the act of obtaining and reinvesting. This is not squandering money on frivolous things or personal gain, but to better her household and give herself and her family a solid foundation on which to prosper.
The wife of noble character is not restrained to the home and domestic duties, but encouraged and expected to find ways, in all aspect of life, to make it better for herself and her family.