Roasting coffee at home once meant modifying equipment. Decades ago, many got their home roasting start by upgrading old hot air popcorn machines. 
Today, you can buy a Popper! The Popper by Sweet Maria’s is an electric air coffee roaster. In just 7 minutes you can have your own small batch ready for home consumption! The Popper gives you full control over time, temperature and air speed. It has a low price and low barrier to entry. Years after some initial Ethiopian-style coffee roasting with my friend Ed, the Popper was my first solo step into home roasting.
Alan V Michael 