Couple thoughts . I'm not that familiar with the 27' Hunter . When we built our bimini there were several things to consider. Our backstay limited how far back the bimini could be . The mainsheet limited how far forward it could be . Cheaper units use aluminum tubing as opposed to stainless steel. There are a number of differant fabric choices . The cheapest is vinyl ,followed by "sharkskin " or other industry names . Many consider Sunbrella to be the best . Some folks have a clear window put in so they can see the mainsail's shape and telltales .
Some folks attach solar panels to the top . Some clip pfds ,bluetooth speakers to the underside . Some are held in place by tension straps ,others by rigid poles . I'd suggest considering all the possible ways you might evenutally use your bimini for ,instead of just buying the first or the cheapest one you find