MIG for recycled metal sculpture work

I've had no experience with MIG and limited experience with ordinary arc welding. But I'd like to set myself up for sculptures from recycled steel.

I know that I need to define what materials I'll be using but that depends partly on the affordability of the tools! For example if I were to be using railway pegs they are around 20mm thick and presumably I would need some pretty expensive gear.

Here's a few examples to get the discussion started. Some are simple, others extremely detailed and far beyond what I am hoping to achieve.

http://www.iowacreations.com/wp-cont...spike-star.jpg

https://scrapsculptures.files.wordpr...esculpture.jpg

https://ecoartsblog.files.wordpress....creations4.jpg

https://ecoartsblog.files.wordpress....creations2.jpg

https://www.deviantart.com/devin-fra...hy-3-200614675

https://www.novica.com/p/recycled-me...orpion/228118/


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