You can get the JC Whitney camera at WalMart for $99
I've heard of a few people putting cameras up front. No problem with that.
Most cameras like that give you a choice between always on and only on when in reverse. If it turns out to be a reverse only system, wiring it to be always on is easy enough.
Horace here on the forum has a forward cam. Can't remember his forum handle though, otherwise we could search his posts for mention of it.