A) No. Your wife cannot seek to change or extend her status if she has no intention to depart the United States. This will be construed as a material misrepresentation and can lead to a permanent bar to admission. You may rely on a joint sponsor if your income is not sufficient to meet the affidavit of support requirements.
B) Possibly. You may be able to use your wife's income or assets to meet the affidavit of support requirements. You can read more about the affidavit of support at http://myattorneyusa.com/sponsoring-for-immigrant-visas-or-adjustment-of-status.
Answered on May 19th, 2016 at 2:20 PM