Final answer:
Heidemarie Schwermer's lifestyle's main obstacle is the constant uncertainty and reliance on others' kindness, stemming from her commitment to living without money and belief in personal connections over material wealth.
Step-by-step explanation:
The main obstacle presented by Heidemarie Schwermer's lifestyle is the constant uncertainty and dependence on the generosity of others. Schwermer, a former high school teacher who chose to live without money, founded a moneyless business called Gib und Nimm, which means 'give and take' in English. Through this business and her lifestyle, she intended to showcase the value of personal connections over material wealth. However, Schwermer's approach requires her to rely heavily on faith and the unknown, as she frequently gives away her possessions and waits for new ones to materialize through the kindness of friends and hosts.
While she has written books such as 'Living Without Money' and donates all proceeds to charity, her lifestyle still poses significant challenges, such as limited family contact and the strain it places on relationships with friends. The unpredictability of her situation and the constant need to adapt to new environments are among the significant hardships resulting from her choice to live without money.