Stayed at the Holiday Inn Express at Brussels Airport. They had a shuttle.
Their shuttle ran only in the afternoon so we got a locker at the airport and took the train into Brussels which is very easy to do. Tooled around, ate
waffles, went to the Music Museum and the park, trained back to the airport. Got our luggage out of the airport and got on the shuttle. They share the parking lot with a Holiday Inn which has free computers in the lobbby. I just walked over and used them. Next morning had free breakfast and shuttled back to catch our flight. The hotel was under $100.