How much money do I have to have in bank to apply for Medicaid?

You need to contact the Nevada division of welfare and supportive assistance (DWSS). if you single, the monthly income cap in your state is $783
You can apply for Medicaid here https://dwss.nv.gov/
and get state specific information on eligibility.

It depends on what type of Medicaid. If it’s Medicaid health insurance then eligibility is determined by monthly income & the amount of income you can have varies by state. If it’s long term care Medicaid (the person applying is in a nursing home or will be going to a nursing home) then eligibility is determined by income and assets. There’s a monthly income limit and in most states you can’t have more than $2k in assets. In NY the asset limit is $15k. In your state of Nevada, for regular Medicaid health insurance, the income limit for a single person is $783 a month.