Well, I'm currently mid kitten adopting (probably), and was intending at some point to look for another cat/kitten.
It would obviously complicate things for me, since I'd have to deal with two cats, and they'd have to be kept apart, at least initially.
It would also help (and not just me, but any other potential adopters) if we had at least a vague idea of location!
If he's entire, and hasn't been neutered, then that'll need to happen pretty soon, since an entire male cat will be very smelly, very fast!
Personally I wouldn't leave a cat to fend for itself more than a short while. Talisker, when he was younger, used to occasionally be left for a couple of nights by himself (ie from one evening to the morning of the day after that next day), but that was left with access to the house via the cat flap, and a very big bowl of dried cat food and water, as well as a bowl of wet cat food immediately before he was left.
He looks to be long(ish) haired, so should probably be brushed a bit daily, otherwise his fur will likely get matted, and need to be cut off (slightly amusingly, one of the local cat bods, who has a feral cat colony, has to essentially have the long haired cats shaved almost bald, once a year, since it's not possible to brush them, and being elderly cats, they aren't really as capable of looking after their own fur as a younger cat is!)