Welcome
@The Hux Sounds like a sweet deal indeed! The better breeders will interview you, and having a fence is pretty typical as a requirement.
I guess you know you can go to both DPCA and UDC websites for breeder references...?
Have you been attempting contact with those closest? Both places have "questions to ask breeders" that help you and the breeders you talk to get a good idea of what you might be looking for in the dobe. Sounds like a mellow male is best fit for senior or small dogs and a cat.
I understand from reading here and another web forum that those best breeders tend to be booked up, and slow to reply some times of the year when shows or regional trials are going on. So dont be afraid to be politely persistent to break thru the inquiries by casual lookie loos and tire kickers. And
@JanS says, if you can travel aways thats pretty typical for those looking for a well bred proven health/temperament/looks and trainability proven by health tests and titles on the parents.
Are you wanting to train from a puppy, or would you be open to a "performance pet"?
From what I've read this seems to be the term for a well-bred pedigreed dog that maybe just didnt make the cut for the breeders line goals...in conformation...
Or maybe a young male that has "finished" but isn't going to be bred, and may be eligible to go to the right home...more makes than females it seems, in excess.
One last idea- if you have the time: go to a regional show or trial put on by the closest DPCA chapter or working line club...just watch and network, good to check out dogs and breeders that way.
And I'd be interested in comments as to likely availability per the customary experience of those reading and commenting here: particularly breeders.
What I read between the lines is if you keep asking the right questions demonstrating your own experience and homework here or other webforums, that then you may get an offer.
Also from what I read, be wary of AKC Marketplace. There is no special quality cut or inspection done to validate the advertisers other than the patents have a pedigree.
If you are on a timeline...
There are always dobes in breed or all breed rescues...DPCA has a list on website, and there were a bunch in OH rescued not long ago, farmed out to various shelters in the Toledo area.
I've had a bunch of rescues over the years, couple heart dogs, but its a crapshoot...esp on big strong dogs, so to avoid baggage thats more work/risk than raising a pup,
Imho its best is foster a month or so (with right of rehome to shelter)
to get past "guest dog phase" to see what you got and is it a fit.
"Life is like a box of chocolates" thats me on dogs in past...