I would work on getting the thumbs down to around 8-10k max - 50k for a thumb is way too much and will eat your bandwidth way too fast
I would also look into getting some sort of virtual hosting with someone other than your ISP (I may be wrong but isnt it still illegal to do adult stuff on german isps?)
And last - but probably most important - while your site would be great for the surfers - quick easy access to the pics - remember the whole point of bothering to make these sites is to SELL!!!! Use the three advertising spots you are allowed on each page and keep in mind youve got about 6 seconds to sell to the surfer - so work on doing that well
