I'd do whichever feels most comfortable, personally. They both seem suitable, from what I can gather. There'd be less risk doing it with no-one in the house, of course, but, if you pull off your method correctly, I imagine that, whatever time you choose, it would be too late when they find you.
Unfinished business won't matter when you're dead, obviously, so it might be worth it to choose to go in two weeks' time...
But that's for you to judge. If you feel really uncomfortable about leaving unfinished business, then maybe it isn't worth it. If you're going to be dead either way, then it doesn't matter how you do it, as long as you do it.
I'd say that you might be more likely to go through with it if you feel like you don't have to force yourself to do it at a certain time.
If you feel like you have to do it at a specific time or you'll get caught, that'll only lead to anxiety which is not a good mindset to be in.
In my opinion, it would be better to feel certain when attempting at a risky time, than to feel unsure and forced when attempting at a time of low risk.
People have killed themselves in public before successfully, which proves that timing and secrecy isn't always so essential - being ready to do it is more important.
If you're going for a slow method such as an overdose, then maybe you'll want to be alone, but you know your situation best; maybe even then they wouldn't hear you.
If both were as risky, I'd do whichever time I could imagine myself doing it at. Maybe have two 'practice' days where you pretend you're ready to do it, and see if you feel more ready in the night or in day.
