Of the core golems:
Clay: Acid Damage heals, at a rate of 1/3 (and can grant temporary HP)
Flesh: Electricity Damage heals, at a rate of 1/3 (and can grant temporary HP)
Iron: Fire damage heals, at a rate of 1/3 (and can grant temporary HP)
Stone: Transmute Mud to Rock heals completely
And tossing in the Shield Guardian: Fast Healing 5; long as it's not fully destroyed, it's good to go in a few minutes.
Now, without non-core spells (such as the Repair line), a Homonculous is a money sink... but why would you make one anyway? You can't make the thing until at least 6th (Craft Construct requires Craft Wondrous and Craft Magic Arms and Armor - and Craft Magic Arms and Armor requires Caster Level 5; so a Wizard can take Craft Wondrous at 3rd, Craft Magic Arms and Armor at 5th, then Craft Construct at 7th for Arcane Eye (well, 6th, if you can get Arcane Eye from a wand/scroll) - Core, that's the earliest), it has almost no HP, hurts you when it dies, and is kinda weak. Okay, it can spy... but it's got a fairly poor hide / Move Silently score - and it's very expensive.