Personally would never do it myself, its not just liver issues , but have heard of quite a few getting digestion problems , stomach ulcers from sustained oral use, also orals tend to destroy cholesterol readings far worse than any injectable. All in all I think orals are generally far worse for health.
I think you would probably get away with just a year without too many probs but don't see the point. There are plenty things far more dangerous in the average household than a few needles, I have 2 kids myself , I keep all my stuff in a locked cabinet. Could maybe get a small safe or something(?)
If you don't like injections , just run esters where you can inject once a week, could still run orals alongside at maybe 6 weeks on 6 weeks off.
Anways not trying to preach, just my 2 cents worth GL with whatever you decide , .