Wanted a 3" or 4" scale Traction engine for starting in the Hobby

[Steamin]

I`m looking to buy a steam traction engine in 3" or 4" scale. It is not easy to find a engine how a young family father can pay for it.
I`m looking also for a unfinished project. If you know somewhere who would sell his engine or unfinished project please contact me.

Thank you for your support!

Best regards Stefan from Switzerland