Bastille day parade balcony

The words cheap and balcony aren't usually found in the same sentence when talking about Paris.

And the parade won't be held on the Champs-Elysees this year due to Olympics preparations.

If I recall correctly it's going to go along Avenue Foch. But then again it might be avenue de la Grande Armée

When I've been, the view from the sidewalk has been fine, away from the formal viewing stands. You might spend your money on a room with a view of the fireworks instead. As noted, "cheap" is not useful in such Search keywords. You are talking about a luxury product.