How much is the minimum income to be qualified for petitioning?

The form is USCIS I864P. the information is there. The need is for you to look up the form and get familiar with the information it offers.

You can fine the income guidelines on the USCIS website (Form I-864P) - the income requirements depend on household size.

The amount of income needed is based on household size. You are 1. Your husband is 1. If you have other household members/dependents, they will be counted as well. So, you should visit the USCIS website for the Form I-864 and look up the income requirements for the correct household size. Consider consulting with immigration counsel.

You have to make 125% of the poverty guidelines.