Re-network to not need NAT gateway

[adj97]

I followed this guide as a beginner to AWS, and soon learnt from my first few mistakes.
After noticing the daily costs of 2 NAT gateways, I did a bit of reading about how to avoid using these costly services.

This guide should have the option (or warning of costly services) to put the services into public subnets (kept secure by security groups) so that NAT gateways aren't necessary.

As a small AWS implementation for beginners, I feel this should be addressed for users to make the most of AWS free tier.
The non-NAT gateway solution proposed is only a suggestion, I am yet to implement this.

[kristofrk]

This would be especially helpful for people with student (or classroom) account. Apart from the price, NAT Gateways don't seem to be supported on classroom accounts.