If I am not mistaken you are probably quoting the $750k to $1MM amount as the starting AUM, right? and not the startup cost.
Would you be able to please provide the names of the company that charge $15k to $18k.
To my knowledge they(CT Trust, Wolters Kluwer) don't do hedge fund formation, only LLC or C-Corp(entity)formation.
That estimate is probably too high for a small to medium size equity fund.
If someone was to build the structure for you from scratch under your ownership, including the LLC's and LP's, PPM documents, marketing materials,...
Separate names with a comma.