To set that many or more the only reliable ones are going to be cabinet incubators or one you build yourself. New GQF incubators are around $800 with shipping, a used one, sometimes you can find for $300 -$350.
To build a DIY cabinet would probably run you as much as buying a used cabinet, if you build it right.
Sorry not trying to be pessimistic but there's really not any incubators made to meet your needs besides what has been mentioned.
There are some good ones that hold fewer eggs but they are expensive but with incubators, you get what you pay for....cheap incubators usually = bad performance.