I've fostered lots of dogs from the UK and abroad. I have several rescues of my own, 2 from the UK and one from Croatia. They are all very easy friendly dogs and have been with me through 25 foster dogs that they shared the house with happily and also 2 human babies that they are great with.
I've had good and not so good rescues from the uk and abroad. I've had terrible experiences with pedigree uk puppies who have health issues.
I'm a very experienced dog owner now but in the past I've had a dog aggressive dog. In hindsight I should have returned her as she limited my daily activities. I could see the aggression within a couple if weeks but I didnt realise how it would eliminate any social walks. I had her 15 years.
As you havent had a dog for a while can you take a friend to the rescue to help you choose, someone who has a dog you can introduce your potential dog too?
My advice would be to get a dog that's in foster not a kennel. The foster homes will know alot more about the dog than they will at kennels.
Also look for a dog confident enough to be on it's own as it will be on it's own. Some ex breeders or foreign dogs need dog company.
You have to give a dog a chance to settle. They say it takes a year. But also go in with an open mind. Your idea of a difficult dog could be someone else's idea of an angel. See the dog a couple of times and identify what's important and see it doing that. As a foster carer I wouldnt mind at all if someone came to see one of my fosters and wanted to see it in several situations- in the park, off lead if appropriate, with a cat, meeting a dog etc. For me it would show how serious they are.
Rescue centres deal with alot of numpties. Weve had all sorts. People send puppies back because they wee on the floor on the first day, grow too big etc.
I do home checks and I would just be looking for a secure garden, size doesn't matter. Security of the front door matters - can the dog bolt. Where will it sleep, what will you do with it when you go out, are you prepared to work through any problems you may encounter, have you got training classes lined up as they are a good idea.
And please dont take 2 weeks off and stay home all that time with the dog. Go out and leave the dog home alone for an hour or 2 from day 1. That way the dog thinks it's norma iin it's new house. Go out even if you dont need to. Leave the dog from day 1 for a short period. Otherwise when you do leave it the dog thinks it's super stressful because it thought it was settled and knew the routine and its changed.
I have had lots of rescues and I'm so pleased your going for a rescue. Be selective. Dont fall in love without considering what your told about the dog. And always ring the rescue if you need help. They have behaviourists that can and will help if you have problems.
Good luck, you will be fab owners as your taking it seriously. I would highly recommend many tears rescue. They rehome all over the country. They have some dogs from abroad so dont be put off looking at them as well as the home grown ones.