Question

Are two people enough to code a website in four months?

Answer 1

Well,

1. if you buy a Joomla quickstart (includes Joomla + Template + Modules) you are going to need less than one month
2. If you buy a WordPress theme that include plugins the same time
3. If you buy a Drupal Theme that includes modules the same.

If no CMS is able to cover your needs and need to write code then from PHP Frameworks

1. Write extensions in WordPress or Joomla or Drupal (easy and fast dev is WordPress)
2. the fastest in develompment is CodeIgniter
3. the best is Laravel

For non PHP or non CMS area the best in money as project value are

• JS
• Python
• JAVA

But I do not know many on non PHP area, the 3 CMS  cover about 45% of the web