cheap hotel in paris close to the Trocadéro, Eiffel TOur and the Champ de Mars

Directions from the Royal Phare Hotel:

On foot, 25 minutes, passing by the Eiffel Tower. Take a right out of the hotel, then the second right onto Avenue de la Bourdonnais.
Continue straight and take the bridge behind the Eiffel Tower (Bridge of Jena).
Trocadero Gardens are on the other side of the bridge.