My first one was breastfed until 1y3m because my wife got pregnant again and stopped producing milk 😂.

With the second one let's see but I think they should breastfeed at least until they can eat everything, after that it's kinda optional.

My first one always slept super well, so there was no need to keep him close, we actually woke him up, so more harm than good.

My issue with keeping the mattress on the floor is the dust accumulation... 

 Bed frames are to keep bugs from crawling on you while you sleep. 

 1 year and 3 months is really good. It varies by child and what they need. Really usually 6 months is fine if you need to. Can just feed them cow, goat milk and a bunch of fatty meat after that.