The Trump boys and the president-elect were only thinking about selling access to the White House. They aren’t really involved in selling access to the president in exchange for a “charitable donation” that is lacking in transparency and specifics.
I've never been to the White House but I would imagine there is a charge to take the tour. It's not supposed to be a source of revenue for the first family though.
These boys are a chip off the old block it seems. Frick and Frack.
Take care of all of your memories, for you cannot relive them - Bob Dylan