A lot will depend on the dog's current situation. Do not assume that because a dog is used to being crated with other dogs close by that it will translate into being comfortable in a crate while alone. I learned this the hard way with my last boy. He developed severe separation anxiety because he had never been truly left on his own before. We worked through it, getting him out of the crate as soon as possible, and he ended up being the most trustworthy Basenji I have had, but there were a few hiccups along the way. If the dog is coming from a breeder he most likely has been used to having lots of canine company. If the breeder has socialized him as a house dog and he is used to being loose in the house the transition will be a lot easier.
Age. An older dog will likely be more settled, but also could potentially come with more issues, depending again on what his current circumstances are. Best to get any new dog at a time when you can be around fairly constantly for the first few days, and work on leaving him alone (crated or uncrated) for short periods of time at first to gauge his reaction. You can hang around in the area to see if howling or screaming occurs, and you can also judge his state of mind by his behaviour when you return. Do make leaving and returning as low key as possible. You don't want the dog to think it is a big deal.
Lots of exercise, of course, both physical and mental. If you have had Beagles you are familiar with independent hounds, so expect a dog that is more interested in pleasing himself than you, and that is easily distracted. Good luck!