The second statement - "A third of Americans can’t afford food, shelter, and healthcare" - is based on a CFPB survey [1] that scores "how people in the U.S. feel about their financial well-being". The survey finds that a third of Americans, experience "running out, or worrying about running out, of food, not being able to afford medical treatment or a place to live, or having utilities turned off". It's not hard to find enough people who are worrying about not being to afford medical treatment.
The third statement - "Healthcare for a family now costs $28k " - is a misquote. The original report [2] states that "the cost of healthcare for a typical American family of four covered by an average employer-sponsored preferred provider organization (PPO) plan is $28,166". The same report lists that employee contribution is $7,674, and employee out-of-pocket is $4,704. If you want to include the full premium as "cost", then you also need to adjust the median household income to include employee contribution and all sorts of non-wage benefits.
[1] https://files.consumerfinance.gov/f/documents/201709_cfpb_fi...
[2] http://us.milliman.com/uploadedFiles/insight/Periodicals/mmi...