A lot depends on where you live. All have been asked to put there hometown in their profile so it will show up under your screen name.
The farther North you go on the Atlantic cost the steeper the tides. This presents a problem with bunk trailers.
And why roller trailers are needed.
Bunk trailers are better easier on the hull.
Id look for a 7000lb trailer . You want one for a 26ftr...... Why? Because it will fit correctly and not have cantlivered bunks past the rear crossmember.
You want a Full length trailer....IE The frame of the trailer to end VERY close to the transom.
Will a trailer designed for a 23ft boat work? Yes...But you will wonder why it's such a PITA to deal with.
I havent see a trailer yet that couldn't use a little tweaking to fit the boat better and make it easier to launch and retrieve the boat. Most people don't have a clue and just put up with it.
I have Very Little experience with a roller trailer.
$3000 sounds to cheap. Yes the trailer for a 28ft will be longer, but it will ride better and the boat fit better.
as a Example....... The trailer I have is designed for a 31ft boat and I have a 2530...
The longer trailer will keep the tow vehicle out of the brine.
You Do NOT want Bearing Buddies....... You want Posi Lube or Sure Lube spindles...[same thing]
This is Very important... I've changed 4 axles under my personal trailers to get rid of Bearing Buddies.
Here you see a 23ft boat on a trailer designed for a 23ft trailer..... This will not do.
Same boat on a trailer for a 28ftr