Answers
1 pralain woods or farming plots.
2 Buy at brownie ranch 1st need to get animal barn at carpenter house.
3 28days all seasons
4 No it does not change the story but are certain advanteges for the plots.
5 Like before brownie ranch when hammer reaches lv 3 & you go near it(by scuffle farm) or you reach spring 28(animal festival)
Hope I could help.
We have more cheats and tips for this game here, Harvest Moon: Tree of Tranquility cheats
Comments for this hint