application_helper.rb

module ApplicationHelper
  def markdown(text)
    Redcarpet.new(text).to_html.html_safe
  end
end

create_listings.rb

class CreateListing < ActiveRecord::Migration
  def self.up
    create_table :listings do |t|
      t.string :name
      t.string :location
      t.text :overview
      t.text :amenities
      t.text :lifestyle
      t.boolean :visible
      
      t.timestamps
    end
  end

  def self.down
    drop_table :pages
  end
end

listing.rb

class Listing < ActiveRecord::Base
end

listing.show.html.erb

<% title @listing.name %>

<div>
  <h3>Location</h3>
  <span><%= @listing.location %></span>
</div>

<div>
  <h3>Overview</h3>
  <%= markdown(@listing.overview) %>
</div>

<div>
  <h3> Amenities </h3>
  <%= markdown(@listing.overview) %>
</div>

<div>
  <h3>Lifestyle</h3>
  <%= markdown(@listing.overview) %>
</div>