The verse points to a large sphere of feminine activity, strikingly in contrast with the degradation to which woman in the East has now fallen.

She considereth a field and buyeth it -
5. She provides for the growing wants of her family. More land will shortly be needed, for the family is growing up; and having seen a field contiguous to her own, which was on sale, she estimates its worth, and purchases it a good bargain; and she pays for it by the fruit of her own industry.
6. She does not restrict herself to the bare necessaries of life; she is able to procure some of its comforts. She plants a vineyard, that she may have wine for a beverage, for medicine, and for sacrifice. This also is procured of her own labor. Whatever goes out brings its worth in; and barter, not buying, is her chief mode of traffic.

She considereth a field, and (k) buyeth it: with the fruit of her hands she planteth a vineyard.
(k) She purchases it with the gains of her travail.

She considereth a field, and buyeth it,.... The field are the Scriptures, in which are hid the rich treasures of Gospel doctrines and promises; and the church, and all truly enlightened persons, consider to what use this field may be put, to what account it will turn; how profitable the Scriptures are, for doctrine, reproof, correction, and instruction in righteousness; what a rich mine and valuable treasure is in them; things more desirable, and of greater worth, than thousands of gold and silver; and therefore will buy this field at any rate, and not sell it; will part with all they have before they will part with that; even life itself, which in an improper sense is called buying of it, though it is without money and without price; see Matthew 13:44;
with the fruit of her hand she planteth a vineyard; her own vineyard, whose plants are an orchard of pomegranates, Song 1:6; who through the ministry of the word, are planted in the house of the Lord, and flourish there; this the church is said to do by her ministers, who plant and water, as Paul and Apollos did, 1-Corinthians 3:6. And it is observable, that in the Hebrew text there is a double reading; the "Keri", or marginal reading, is feminine; but the "Cetib", or writing, is masculine; to show that she did it by means of men, she made use of in her vineyard for that service; it being, as Aben Ezra observes, not the custom and business of women to plant vineyards, but men. It may be rendered, "he planted", and be applied to her husband, Christ; who, through the ministry of the word in his church, plants souls in it; and happy are they who are the planting of the Lord! trees of righteousness, that he may be glorified, Isaiah 61:3.

and hence has means to purchase property.

This industry - a pattern for the whole house - this punctuality in the management of household matters, secures to her success in the extension of her household wealth:
16 ז She seeketh a field and getteth possession of it;
Of the fruit of her hands she planteth a vineyard.
The field which she considereth, towards which her wish and her effort are directed, is perhaps not one beyond those which she already possesses, but one which has hitherto been wanting to her family; for the poet has, after Proverbs 31:23, an inhabitant of a town in his eye, - a woman whose husband is not a landlord, but has a business in the city. The perf. זממה precedes and gives circumstantiality to the chief factum expressed by ותּקּחה. Regarding זמם, vid., Proverbs 21:27. "לקח is the general expression for purchasing, as נתן, 24b, for selling. Thus the Aram. and Arab. אחד, while, (Arab.) akhadh w'ṭa, Turk. alisch werisch (from elmeḳ, to take, and wirmek, to give - viz. ṣâtun, in the way of selling; Lat. venum), post-bibl. משּׂא וּמתּן or מקּח וּממכּר, denotes giving and taking = business in general" (Fleischer). In 16b the Chethı̂b is, with Ewald and Bertheau, to be read נטע, and, with Hitzig, to be made dependent on ותקחה, as parallel obj.: "of her hands' fruit (she gaineth) a planting of vines." But a planting of vines would be expressed by מטּע כרם (Micah 1:6); and the Kerı̂ נטעה is more acceptable. The perf., as a fundamental verbal form, is here the expression of the abstract present: she plants a vineyard, for she purchases vines from the profit of her industry (Isaiah 7:23, cf. Proverbs 5:2).

Considereth - Whether it be fit for her use. The fruit - With the effects of her diligence. Planteth - She improves the land to the best advantage.