[haldora]

Have you documented this somewhere online, and do you have pictures? Using an old train car sounds very interesting and unique! I'd enjoy reading more.

[irrational]

Based on the description and OP's username, I think this might be it:

https://www.apartmenttherapy.com/1949-railroad-boxcar-on-mer...

[nyolfen]

op said he's lived in it for 9 years, this says 30. also first name doesn't match his username.