No.  If you are eligible for Medicaid you cannot be eligible for marketplace subsidies.  Some people who receive UI benefits will be eligible for Medicaid, in part because Medicaid will NOT take into account the $300 per week federal supplemental UI benefits.  When you apply through the marketplace, you will receive a determination indicating whether you are eligible for Medicaid.  Medicaid coverage is also free or low cost (some states charge a nominal monthly premium…

Yes.  The subsidy will be available beginning April 1, 2021, and you can have it for up to 6 months or until your COBRA eligibility ends, whichever comes first.

Yes.  The COBRA premium subsidy is payable starting on April 1, 2021 until September 30, 2021 or until your COBRA eligibility ends whichever comes first.  So in your case, you will be able to get the subsidy for five months (April through August). 

No.  People lose eligibility for the COBRA premium subsidy when they become eligible for other job-based health coverage.  You are required to notify your former employer or COBRA administrator if you become eligible for other job-based health coverage.  If you do not, you might owe a penalty.

You can continue on COBRA unsubsidized until your 18 months of COBRA eligibility ends. In addition, you will have the option to enroll in marketplace coverage when the subsidy ends in September.  Loss of the COBRA subsidy will make you eligible for a special enrollment period (SEP) to sign up for marketplace coverage.  If you make your plan selection before the end of September, new marketplace coverage will take effect on October 1.