according to the dictionary "farma" is
- a farm in English speaking country
- a farm specialized in some kind of products

"ferma"
-a farm that is specialized in animals

Gospodarstwo
- a country estate including ground and buildings, also also a unit of agricultural production
- household things
- all the home and family matters

gospodarstwo domowe:
- all of activities and things with running a home

gospodarstwo rolne
- agricultural production unit

from http://sjp.pwn.pl/szukaj/gospodarstwo.html, translation mine.

I agree. "Farma" sounds very "Pol-english"