I'm in the unusual position of being a EU citizen moving to Brussels for at least a year but being neither an employee, a full-time student or an EU pensioner (UK citizen but lived in the US since 1990). My intention is to learn French there and may take classes but won't be a full-time student. To register for the "E-card" as a new resident it requires "proof of support" and I have more than enough saved I assume for that but it also requires proof of health insurance. Would a private high deductible plan (around 100 Euros a month for me) be sufficient for this? I don't seem to be eligible for the mutuelles though I would willingly buy into them given the chance.