Regarding the Levain starter...
We binned ours before going to South America for 12 weeks, and kicked off a new one when we got back.
I'm following the Ken Forkish method.
It's started with nothing other than a 100% hydrated wholemeal flour and water slurry on day 1.
On day 2, you bin around 75% of it, and add more flour and water.
This continues for around 5 days, at which point the levain is possibly useable.
It took a bit longer here.
This will feel quite wasteful of flour as you ditch so much each day.
Once it's vigorous, the hydration is reduced and it's maintained at 80% hydration.
(Many recipies will maintain the levain at 100%, because that makes for easy calculation of the hydration of your final dough, but I just go with Ken's 80% because I don't then have to re-calculate his flour and water weights for specific hydrations.)
Once you've used some of the levain to bake with, the remainder goes in a ziplock bag inside a plastic tub in the fridge.
It can happily sit there for several weeks with no intervention or feeding.
It's a two-day thing to revive the levain out of it's hibernation, so needs a bit of forward planning.
A typical timeline would be:
Day1 AM: weigh out a specified quantity (typically 100g) of levain from the fridge into the leavain tub, feed with measured quantity of flour and water. It will triple in volume towards the end of the day.
Day2 AM: It will have run out of food, and fallen back a bit. Bin all but 50g in the tub. Feed again with measured quantity of flour and water. It will triple in volume towards the end of the day.
Day2 PM: Mix final dough using some of the levain, do folds, overnight bulk ferment 12 to 15 hours. Remaining levain goes into fridge, replacing any left over from day1, becoming the new stored levain.
Day3 AM: Shape into loaves, into banneton, proof for around 3 to 4 hours. Bake around noon.
It does seem to stand being hibernated very well.