there wouldnt be a lot to do without the zombie concept other than "hi mr. slave owner johnson can i have some crops"
"why yes you can! billy! come here and give him soem corn"
"okay dawg fien dwag ill do it for you dawg man swag yolo"
"thanks!"
You've obviously never tried an actual Western Rp on Blockland.
There is a surprisingly large amount of roleplay possible, with just a few amenities within a town.
People pretending to be travelers, who may be bandits hiding from the law, or snake-oil conmen, or preachers or thieves.
Then the interaction between many other local characters, like rough cowboys starting fights amongst local citizens in the Taverns.
Or dueling families, with Noon gun-downs in the centre of town.
Have a Sheriff's office, and give a few people rights as deputies or officers, to attempt to maintain order.
This brings in the chance for criminal activities, or posse's being formed in hunt of criminals, or for cases of bribery.
What's also nice with a Sheriff is that you can institute an Admin in as the position, who can act as an administrator of the server in a roleplay manner.
Someone causing hastle among other players? Sheriff arrests them and sends them to prison (Ban).
This also allows for easy administration in concern to those who can't roleplay well, such as those who just shoot everyone. Got a murderer like that, arrest and execute (ban).
I would highly recommend you were to try a proper Western Roleplay, before jumping straight to a cliche Zombie Infestation.
Not to mention, you'll get a lot of criticism on it being just an unoriginal copy of
Rockstar's Red Dead Redemption: Undead Nightmare, which it's fairly obvious that you have taken atleast some considerable inspiration from that, judging just from the title, let alone the theme.
Vanilla Westerns can be so much fun, and even with lower-quality builds you can really get a great atmosphere generated and maintain a fun and intelligent community. Don't underestimate the imaginations of the players of Blockland.
I've hosted enough roleplays on various themes to know that someone will always surprise you, and you never get the same experience twice. Even if your build is little more than a box.
All that aside, I wish you a lot of luck with this.
I know your clan has put a fair amount of work into this build, and I'd like to come by and see the finished project at some time.
Hopefully people enjoy it and the work pays off. I just hope your adminstrative team are capable of maintaining a fair and fun roleplay server.