A lot of people will tell you, "No, don't do it." I am one of them. For your first frogs especially, it will not be as likely that you'll have a good first experience. Who wants to systematically kill baby frogs? I mean, really? that's the plan and sounds good on paper, but when push comes to shove and the cute little guys and gals are hopping around and you're so proud of them, then you're just gonna shove them into a gas chamber? then repeat every time you find a cute little guy hopping about after he's survived the odds to even get that far in life? That seems pretty cold to me, but power to you if you think that will be a good experience for you.
On the flip side, you could do separate enclosures, enjoy the reward of having your frogs breed for you and not have to kill them all. Personally, I'd pick option #2 any day of the week.
As a side note, you're asking for the advise of professional breeders over hobbyists. I'm not sure what you think they do with their frogs, but all the "professional" breeders i know understand how important it is to keep the bloodlines and species separate. Any breeder producing mixed frogs would never get to the point of being professional. Just won't happen here, so no I don't believe that any professional breeder is going to log on and give you the advice that "hell yeah, that's sounds awesome".
You are of course more than welcome to hold your breath, I just can't recommend it.