looking for a boat

Hard to think of a trawler with gassers and mainship quality isn't the best. Not familiar with the rosborough.

Hard to give an opinion on all the others. Overall albins are pretty good. Taiwan trawlers from the 80 were hit or miss especially when it came to fuel tanks and system s

The year of these boats isnt as important as the initial built quality or the maintenace and upgrades it received.

I ll take a 70s vintage hatteras or Bertram or... to a 90s vintage taiwan trawler.

paulga
It appears to me; your not a seasoned boater and your shopping by price.
That's o k.
In boat shopping and asking for support we do need certain information.
Where are you going to cruise? How many on board? Live-aboard?
OR, is this a dock queen apartment project?

Then we know to stay away from cheap gassers. Your first post included a twin gas model that may make better reef material than a trawler.

Bertram never made a cruiser or trawler. Their MYs (like mine) are fun and safe but NO economy.

Hatteras made LRCs (long range cruisers). Almost a trawler, more interior room yet still able to make some MPG. Glass fuel tanks were nice also.

And sport fishers will not make MPG well either.

Fuel costs are only a small part of the overall costs... don't obsess on fuel economy.

Any boat came be run at hull speed (anywhere between 7 and 9 kts depending on length) and get reasonable fuel economy in the 5 to 9 GPH range. If that's too high.... learn how to sail

My 53 Hatteras MY burns about 9gph at 9kts.

You may be burning 5gph at 6 or 7kts in a 36' trawler but what are the actual savings? Go 2 or 3 kts faster on an additional 4 to 5 GPH? Makes little difference by the time to factor in dockage, insurance, maintenance, etc. fuel is a very small part of the average budgets

Ocean Yachts Sunliner model, are a nice boat. Made in the 80's. Ocean made a 42 and 46 foot model. Both have the same roomy bright layout. Detroit Diesel power in most, lots of DD mechanics around, not so with Perkins. It's a nice used boat for the price. It's kind of a stylish fast trawler, in my opinion. You can run them slow like a trawler or fast like a sport fish.