Honestly she would probably have a lower rate if anything going to the marketplace once she graduates. Since it is all based on income, she won't have much. I would stop paying BM. If he wanted to be really nice (which I doubt) he could offer to pay 1/2 her marketplace policy. 

I know a single mom with 3 girls, she gets very little child support and doesn't have the greatest job. For her whole family she only pays like $150/mo. I pay more than that for just myself and my employer pays 50% of mine! 

If the CO states he has to pay until she is X age.  He would have to pay it.  Otherwise, it is going to be a matter of whether he and his ex want to and can continue to afford to pay the premium and whether it is cheaper to do that than go to the exchange.  I don't see a huge issue with a parent helping their adult child out... especially if it results in a big savings. 

Perhaps the payment could be split three ways... and child pays 1/3, mom 1/3 and dad 1/3? 

It does not require it.  So, if SD-18 is not doing as she is told by DH.... cut her loose and see how she fairs.  ACA will allow her to cover herself for a fair monthly premium cost until her income grows to the threshold where she no longer is eligible for a premium discount.  Then it will go way up.

We had ACA from Jan until the end of this month.  I accepted  a new position starting Feb 26 but my cancelation of ACA coverage does not go into effect until the end of this month.  I was very impressed with how easy it was to get coverage and that premium discount support was income based rather than asset based.  SD should be able to get ACA coverage under a life changing event.  Our only income was my unemployment check and we have great coverage for both medical and dental for $340/mo for both DW and I.  The full cost would have been $1300/mo without the income premium credit. It took about 30sec to fill out he information and have the credit awarded. It took us a few days to research available plans in our state market place.  We picked a low deductible high coverage plan.  I was skeptical to say the least. Having always had excellent employer provided coverage made me wary of the healtcare.gov concept. 

What converted me on the concept was when I got my first 3mo round of Rx's and paid $0.00 for what would have been nearly $3K if I had not had insurance.  We have very good coverage from a well known and respected company.

That is one thing that my SS has made us proud about. Having been raised by a nearly life long T-1 diabetic he knows how important insurance coverage is.  That is one of the reasons he joined the USAF.  Great benefits and career longevity.  He knew he wasn't ready to study and be responsible for performing in college. I am proud that he recognized that and stood his ground with his mom and I as we busted his chops about getting into school.  So, he  has been working towards his BSCS while pursuing a USAF career.  SSgt Rags is kicking butt! *  drinks*

Good luck to your SD in her chosen trade.  I hope she can navigate the final years of growing into a viable adult successfully.  At some point many children reach a point where their parents have done what they can and the kids have to finish the process on their own time and  their own dime.

I carried both of my SD's on my insurance past the age of 18.  Their father was responsible for ensuring they were covered per his CO.. but only till 18.  However, since the additional cost to have them on my policy was negligable, we continued to cover them both past age 18... one of the girls had a medical condition that was ongoing and we didn't want her uncovered and when you take one dependent.. it was the same cost to have her sister on as well.

We stopped that coverage when the older sister had a baby (got married and was on her husband's plan then) and the younger daughter was able to get full insurance coverage from her work which required her to pay no premiums. 

If it isn't super expensive and in fact cheaper than they can get through an exchange or another job.. I say keeping them on the plan is a nice thing to do.  The impact of a serious medical issue on their financial well being could be catastrophic.  So... if it isn't a lot of money and it is affordable.. I think it's ok to give kids a break.

Tattoo artists "can make up to 40K"  which seems like a lot of money to a young person but. . . I was thinking, don't they also have to have some sort of malpractice insurance as well?  What if a customer decides to sue?  They are basically practicing medicine on the largest organ of the human body!