Where can I rent a wedding dress in Jacksonville Florida; or where can I buy a wedding dress cheap.?

Unfortunately the only places in your area seem to be for tuxedo rentals.  You can try and look in your local newspaper, sometimes you will see a wedding dress for sale at a really low price!  House of Brides has alot of options on lower prices wedding gowns, and they have a special offer for free shoes and a free veil!  There is an Alexia Designs strapless gown for $138.00
specifics:
This strapless dress features a fold at the neckline and an A-line skirt with pick-ups.
Shown in Ivory.

• Strapless neckline
• Natural waistline
• A-Line silhouette
• Satin fabric
• Floor Length hemline

They have a Forever Yours Wedding dress selling for $127.00
specifics:
House of Brides presents the Forever Yours Bridal collection by Forever Yours. This brilliant collection of wedding dresses combines classic silhouettes and striking detail for a look that's simply alluring. Forever Yours Bridal wedding dresses feature unexpected details such as exaggerated beading to bold accents of colors. Go beyond ordinary with Forever Yours Bridal collection by Forever Yours!