Also building a tree-house with a moat isn't going to solve the problem of getting food, or when massive hoards of zombies are lurking through in 100s a shovel made moat would render useless. The group is looking for the most suitable place to make a settlement, and the farm with gated fences and forest around a huge radius is the best one they came across in their search. It's not so easy to just create a massive base with moats and bridges when everywhere you go there are zombies already roaming the world, and the fact that there are crazy human communities armed to the teeth raping and killing other groups doesn't help either.
bitch please
all you need is a fucking excavator, then you can do it within a few days. strange thing i have never seen an excavator in The Walking Dead...
also i am not talking about ONE fucking tree with some wooden floor on it, im talking about a complex system of multiple trees being connected to each other, with some flying fox thing to escape etc.
also its a combination dooood. a moat will do all the work. the tree house is just there to sleep and to escape safely.
if the thing about the tank soldiers will get resolved later then im really looking forward for the explanation. and afaik i have finished all season that are there. the last episode ended with the stupid whore being saved by some ninja bitch with zombie slaves.