One instance of the
EJB Home is sufficient - it's only required to create or locate the EJB's themselves.
WHen you do a "find" operation and get 100 results, the actual results are typically actually only the primary keys of the matching objects, and the primary keys are fairly lightweight. Only when you actually reference the EJB will the primary key be used to load the full EJB.
Still, for best performance, you will want to keep the size of the match set as small as is reasonable and not hold onto it any longer than necessary.
The secret of how to be miserable is to constantly expect things are going to happen the way that they are "supposed" to happen.
You can have faith, which carries the understanding that you may be disappointed. Then there's being a willfully-blind idiot, which virtually guarantees it.