jotform.com is close to what you're looking for.. You get more entries but not 10x more. And their 'almost unlimited' version is only $50/month. Note that the

jotform.com is close to what you're looking for.. You get more entries but not 10x more. And their 'almost unlimited' version is only $50/month. Note that they also license their engine for surprisingly cheap (IIRC $250), so you could run it on your own server if you really wanted to.