Hi,
You can maybe find your apartment on Immoweb.be or zimmo.be
You have to choose your location: Never-over-hembeek of Vilvoorde or a little bit far
You will find a few things, but it is not easy to find something only for 3 month... and very expensive
You can also ask the nurses at KDM office. They have sometimes ideas.
An other "solution" if your not too ill and you can have help, is to spend the 3 days (the first treatment) in a hotel (eurovolley center)
and take the rest of the week at the sea (the train is not far) and you can rent something nice for a month (or more) at the sea... But if it is in august, it will be short...
Some of the flemish people, come only once a week just to fix the porta-cath, and then a nurse came every day to give the perfusion... ask the KDM's nurse how they do that... and with which service/company... I think it is not very expensive. and so you can choose where to go...
Clodomir