hmmmm using a free domain ".tk" and I sure do hope your not running with a free hosting sites they don't ever last long... Templar1 is absolutely right with you should host your own files or you will spin your wheels with broken links and a constant filled email email telling you that your missing a file...
Submissions are great but odd's are your gonna have to do what Templar1 already has done for the most part is when someone submits here at the forum ask the modeler for permission to host his file and find out what his requirements on the use of his work.
Also with your web hosting make sure your package is high on the bandwidth I doubt you will hit a 5 gb mark with the files and website itself... Unless you expect to put in a lot of video tutorials..
I am a web designer by trade myself and script in asp, php, cfm and I know how to build databases like IIS, sql, mysql, oracle so if you got questions on building your site feel free to hit me up if you run into any bugs.
Templar1 ran with a great idea by using a CMS "Content Management System" Nuke I believe and this may be alot less headaches for you when designing your website.
I see Templar1 is giving suggestions here just a personal suggestion maybe you should consult with him and find out what may be the best route to take to get this community to warm up to you.... Because I know we all like Templar1
Have you downloaded your CLiPs today.