A 45' to 52' trawler is a big boat. It is (was) expensive to build. It's also going to be expensive to store, maintain and operate. A low initial price won't mean much when you look for a slip or go to the fuel dock.
Boating is not an inexpensive hobby. You have to pay to play.
My suggestion is to evaluate your needs vs. your wants. Many people do just fine with trawlers in the 30' range.