I know I've asked my grandmother and her respond: "yes only in the church" (I don't know - maybe she's just really traditional and believe it is the only way)...so I am asking away here...is it possible to have the priest done outside the church? (I don't mind in church; just asking away).
That is what the tradition is but the law does not specify the actual location. If you can get the priest to wear a diver's suit, the wedding may take place under water. Of course you will pay for this kind of service through the nose (for the glory of Our Lord, of course).
If you want a scaled down ceremony there are no problems. The lay wedding takes a few minutes and costs peanuts. You can do it 7 days a week. Likewise, a wedding in Church can take place any time, although it will usually costs more.
Some people opt for smaller churches/chapels, and on week days, or Saturdays when services are not held except for the early morning and late afternoon/evening.
A Catholic marriage ceremony outside a church building is a possibility too. There is nothing in either civil, or cannonical law to prevent that.
During communist times a lot of career commies would get married secretly in Churches or in their homes (so that the commie party officials wouldn't know), so Polish priests can be pretty flexible in this regard.
But always remember, in the minds of many Polish Catholic priests they are not here to serve you. You are there to serve the Lord. Indirectly of course. The more you pay the better the seat in the heavenly jet you get. With an extra $ or two, you may be even seated in the same row as St. Paul.