home made oven to melt stuff..?

True enough.

They are fairly easy to build, you can make small ones out of paint cans, you can make larger ones out of 55 gallon drums. There is tons and tons of information all over the internet on this subject, there are forums that have to do with building furnaces, melting metals, etc.

Even if you are just melting Aluminum, you are making more once you melt and pour into a bar than you would if you tried to sell them as aluminum scrap.

A melt furnace changes everything. But it is dangerous, after all you are dealing with molten metal. if example, if there is any water in the furnace cement, it could crack or worse. You cannot operate one of these furnaces on cement, because it will literally make the cement explode, pouring isn't as easy as you might think. I can remove a pour a size #20 crucible, but it's heavy and difficult to control, when I first started I could only handle a #10, so it too me awhile before I built up the strength and coordination to be able to handle the larger crucibles.

Anyway, it's totally doable, and if this is your first furnace I would encourage you to build a small one to start so you can get the hang of it. You can build larger ones later and sell the smaller one if need be, but you will serve yourself better starting smaller, spending less, deciding how you want to modify your next furnace before jumping into a shallow pool with a blindfold on.

Scott