What is Reddit's opinion of The Charcoal Foundry (Build Your Own Metal Working Shop From Scrap Serie Book 1)?
From 3.5 billion Reddit comments

By popularity on Reddit, this product is:

#1 in Two-Hour Craft, Hobby & Home Short Reads

5 reviews of this product found across Reddit:

you might get away with melting Aluminium, but to be honest if you plan on doing casting you'll want a forge and a foundry. the foundry is a better shape to handle a crucible, and inappropriate for most forging - but it can be done.

but for that you want to go with something like a kaowool and hot face - if you want portable.

have you looked at http://www.amazon.com/Charcoal-Foundry-Build-Metal-Working-ebook/dp/B005STTBBM/ref=sr_1_2?ie=UTF8&qid=1463618766&sr=8-2&keywords=gingery

There are many unexpected dangers in metalcasting and I didn't watch the whole video to see which ones they warn about. A good book is the first book of Dave Gingery's series.

If you aren't machining the material afterwards, cans are probably OK as a source material.

You can start with aluminium casting. It's not like it's free of dangers, but since the temperature is relatively manageable it's a good way to get a general feel for it and assemble the correct equipment. There are lots and lots of guides out there. David Gingery has written a series about creating a metal workshop from scratch at home. https://www.amazon.com/gp/product/B005STTBBM is the first book, about a small charcoal foundry.

I'd love to see a video, but there's a book series that describes something along those lines:

https://www.amazon.com/Charcoal-Foundry-Build-Metal-Working-ebook/dp/B005STTBBM

If you're not afraid of DIY, maybe try Gingery?