I read this article about off-grid tezos oven, a computer capable to calculate tezos with power from a solar panel and water-mill only. Also this thread on Reddit let's us know that loosing the connection to other nodes for a while is not crucial mistake, if you not drop out of line for more than 24 hours. That means you don't have to be always online while baking.
Also from the same Reddit post I understood the asking of nonce is the action that is not allowed to be missed, but if you miss it, it would be resent to you.
Is there any network quality restrictions on tezos nonce asking? The Reddit post writer tells the nonce will be asked again on no reach situations, but are there also other network problems handled, like timeouts or dropping connections?