If I remember right, winter is Nov-Feb. You actually don't need a lot of them, they refill quickly during winter time. The amount you need depends on the size of your farm. I would say a small one supplies about 6 crops, so 3-4 small or 2 large ones should be enough for a farm which supplies enough food. Another tip is to build a rain barrel on the roof above a sink (not directly the same square but one to the left or right of it) and you will get clean water out of your sink which you can even drink. Crops will also grow with dirty water.
You can alternatively fill pots with the water and store that instead of having all those barrels. Also might want to locate a well or river near you, load up with a bag of pots, and make regular hauls up from your source.
You're implying that there's any originality left in the zombie genre. Even PZ isn't exactly fresh. The only really thing that sets it apart is the isometric style. Pretty much every other element in the game has been done before. There's nothing wrong with that, not if it's done well and not a complete ripoff. Just saying that nowadays the zombie genre doesn't leave much creative wiggle room.
For the record, the last two zombie movies I saw that I thought were pretty unique were Train to Busan (Korean, for one thing, and taking place on a train) and Maggie (takes place AFTER the zombie apocalypse where the living defeated the undead, but just barely)
i believe 7 floors is enough anyway cause you can put plenty detail into that and most of the time for example going down a street u wont be able to see the roof anyway giving the illusion that its a huge skyscraper
if imma be honest i barely ever bother looting big buildings in these types of games simply cause its too time consuming, monotone and boring but thats just me i guess, id be real happy with a new york map that had only 7 floors max
The majority of PZ players want to live out TWD universe. Or most Zombie or Apocalyptic movies/tv shows period. Find a group, be the "good guys", rebuild a community and kill the zombies and occasional bad guys in overly dramatic fashion.