How do you get a ladder in monster hunter freedom unite

You renovate the Mining point on the farm. Go to the yellow guy that stand right outside the farm, talk to him and choose renovate, you've got to clear specific missions for it. Pokke points needed to renovate the mining point.

To unlock them you must increase your hr (hunter rank) in the guild, veggie elder, and Nekoht missions. Mostly the big missions like defeating a monster that will destroy the town (Shen Gaoren, Lao Shan Lung Series, Akantor etc. Monsters that are over 1500 feet or 2000.)