load_any_number_of_tweets.rb

# A (very) naive approach to load arbitrary number of tweets
# using max_id option

require 'twitter'

client = Twitter::REST::Client.new do |config|
	config.consumer_key        = ''
	config.consumer_secret     = ''
	config.access_token = ''
	config.access_token_secret = ''
end

tweets = []
options = {count: 10, include_rts: true} # count <= 200
loop do
	options[:max_id] = (tweets.last.id - 1) if tweets.any? # just get the latest tweet's id
	tweets.push(*client.user_timeline('USERNAME_HERE', options))
	break if tweets.count > 50 # any number...
end

puts tweets.count