It is not overly difficult to get a familiar that can reliably use a wand. Invest in UMD, the Evolved Familiar feat or the Figment Familiar archetype to get the Skilled evolution.
A wand of animal's ability costs 4500 GP. That's 500 GP more than a +2 belt or headband, but provides +4 right from the start. It lasts 3 minutes, thus at least one combat and your familiar can cast it on you, preserving your action economy. 50 charges should last you until you can afford a +4 or even +6 item.
Comments? Am I missing anything?
Well, it wont help you get more spells per day and you don't start out buffed which may or may not be an important consideration. You wont qualify for feats which have a higher score than your normal score because the enhancement is not a permanent effect.
Also, keep in mind you can't taake 10 on UMD so your familiar needs at least a +10 bonus to have a reasonable chance of activating it when you want him to.
This is something that does get done, but it's not so overwhelmingly good. For martial characters its a couple points better to hit and damage, for casters your spell DCs are a couple points higher. It doesn't do much outside of that. Not that those things aren't good, but they're not the end of the world either.
Well, it wont help you get more spells per day and you don't start out buffed which may or may not be an important consideration. You wont qualify for feats which have a higher score than your normal score because the enhancement is not a permanent effect.
Good point! So this is clearly better for physical abilities.