Production efficiency and cost

As an industrialist you have to check every part of the equation; is the material not too expensive, am I losing ISK on the time spent manufacturing, would it be more cost effective to just buy the invented BPC’s from someone and so on. 
I.. Don’t really do that. This is partly due to laziness and partly because I just enjoy doing what I do, not really caring if I make a profit out of it.
Which is one of the many things in my EvE time that I should work on, but as my readers (yes you two there) might already know, planning isn’t really my strong suit. 
A good example of this is the fact that the past week I haven’t done any manufacturing at all. I was missing one tiny part for my production but I didn’t feel like going out to Jita to get it, despite the fact that I have an alt parked there and I could have easily put up a courier contract to bring it to me. 
My time vs efficiency isn’t quite as it should be. At least I was still doing my invention, right? 
I have a few thousand BPC’s still waiting on their time to come, their moment to shine, to become an X or a V.. After that, or maybe even before that, I will be retiring my POS, something I decided on a few weeks ago but am finally coming to terms with. I’m not using it to its full power and therefor there’s no reason for me to keep using it.
Retiring my POS might even mean that my industrialist goes on his way to Null sec. The WH corp I joined on my combat alt has an industrialist branch who have a null sec HQ that I was offered to join. I might just take them up for that.
But that’s something for in a few months from now, because as we know. Planning and I, it doesn’t really work.