Jet, you may want to pass on to them that the guide they are using is only half complete, there are two other quests after the ones in that guide to get the large farm. I made a post with a very short and concise guide ( That I copy and pasted) with all the mats you need in the public forums. Not to poop on their plan but its impossible for anyone to be ready at "T+12 Hours" Olives alone take about 12 hours to grow after they are planted (10 Hours if planted in Temperate), and you need multiple, 12, per person. The earliest even the best "farm rushers" will be able to do is around "T+36 Hours"

They are right about the farm houses though, rushing the green quests is very possible in 2 hours for the best group, 3-4 for a group that hasn't done it before probably. But the spot they are talking about, "Florida" as its known, is very small, has about enough room for about 20ish houses I think, thats the place I was wanting to go myself, but I'm going to play it safe.