Unless you've found a really great buy in a package, I'd
start with a tank, possibly homemade, and a lighting system.
The light *may* provide all (or more) heat than you need.
Heat, light, humidity, and such really will be a factor of
what you want to grow. Some of my plants do well in a window
sill tray of water with natural sunlight, while others like
an enclosed terrarium with cool white flourescent lights.
Can you give us some more hints?
Jeff in NC
(Where its too damned hot for April)