Hard to say with the ivy without seeing it. A well established ivy removed from a wall (does she want you to dispose of it too?) that size could take a couple of days if you intend to do a pucker job. You'll never get rid of all the tendril marks left on the brick-work, but its COULD take you a long long time that one, particularly if she wants a good job done.
She needs to be asked how good a job she wants otherwise you could regret taking that on.