You really want to have some source of +buy or some alternative way of gaining cards. Remodel, Expand, or Graverobber; Tournament, Altar, Count, or Rebuild; Forge, Upgrade, or Remake. Remodeling or Processioning a Hunting Grounds is nice.
I remember a classic game being posted once in which Marin bought Caches and Expanded the Coppers ultimately into Dukes and Duchies.