amount vs. number

Use less for continuous quantities, fewer for countable ones. The confusion seems to arise from false symmetry with more, which can be used for both. Don't hesitate to use the actual words number or amount to make your meaning clear.

• • I was also really loving the challenge of having far far less rooms. 🔗
  • I was also really loving the challenge of having far fewer rooms.
• • We don't need to make a huge amount of plans in advance. 🔗
  • We don't need to make a huge number of plans in advance.
  • We don't need to make a lot of plans in advance.
  • We don't need to make a ton of plans in advance.