Our beagle is 4 years old. Had her from puppy and is very well trained. A beautiful breed, loyal, full of personality- a joy to have as a companion. Had one prior to her too.
You need to think more on whether YOU would suit this type of breed rather than it suit you. People get dogs based on looks and make them suit their lifestyle which isn’t then fair on that breed of dog. It is a shame to read so many negative comments about beagles- from experience I see these behaviours are usually down to owners not being compatible with the type of breed.
You need to put a huge amount of effort and time into this breed, they are highly intelligent and need stimulation, routine and exercise off lead, or else will put on weight/be destructive/have bad recall. Play games of hiding toys/treats, throw ball, firm with signal regarding food and rewards, each and every day is a must.
From an early age, you must leave a beagle a couple of hours (built up to 4 in our case) so they learn to self-soothe otherwise become too attached, unable to be left .
Vast majority of time ours is walked off lead / happily runs alongside when jogging, she does up to 7 mile runs, 13 mile walks as her limit. She gets at least a 4-6 mile walk each day.
She’ll go for deer, as is her instinct (flushing/hunting breed) but will always come back as trained.
They are beautiful, rewarding dogs, but don’t suit everyone. An under-stimulated, under-exercised beagle will cause issues (as is the case with most active breeds)