adding a new dog to a pack - help;-)

[lindiak007]

I have a 2,5 beagle (25% daschund) male (in the picture). I would like to add a bigger dog to "my pack" and was thinking of Rhodesian Ridgeback female.
What do you think of this combination?

I am not afraid of them being at house, just outside. I believe the Ridgeback needs more movement and my beagle even he fetches the ball, he doesn't fight for it too much, so I do not know how would they do outside when play.

Is it hard to have 2 dogs offleash as well?
Is it better to get the Ridgeback as a puppy?

Maybe somebody with small/big dogs mix could help?

Thank you