On a decent size machine there should be no difficulty in using 75m of hose.
On flows of 15lpm or more 3/8 would be better than 1/4 as the resistance can cause a pressure spike but nothing major to worry about so long as the machine can clear the water efficiently.
If you are looking for light weight hose and currently have the heavy twin wire type stuff rated to 400bar look for some twin wire compact hose the working pressure is slightly lower at 330 Bar but it weighs the same as single. (Internal wire wound more tightly so doesn't have a second set of outers with extra rubber layer to get rating)
Also when reels are sold they are usually done so by capacity in single wire hose so a 30m reel won't necessarily take 30m of twin wire hose. Some do some don't.
Ben