There is of course no standardisation for home visits because even within rescues the standard of care varies considerably. I can't speak for any other rescues but making a home visit is only one part of the whole rehoming process.
I'm not judging people, their homes, their financial situation, their lifestyle - I am purely there on behalf of the guinea pigs and their future welfare. I don't decide that I like you or dislike you although I have made some really fantastic friends through visiting them at home to talk about adopting an animal. I don't have a check list, I'm not rude nor do I turn people down flat. The only thing that matters to me after I've rescued a piggie or two, nursed them through ill health, watched them blossom under my care, groomed them, bathed them, fed them and cleaned them out, I have one final thing to do for them and that is to get them the right home - that's all I'm thinking about.
My initial contact would be by phone anyway and a lengthy conversation would enable me to decide whether to take the adoption process any further. Sadly, in the case of people keeping piggies on shavings when so much evidence exists that they are detrimental to the piggies wellbeing I'm afraid I would not take any further steps. I perhaps would have reservations about the fact that they are simply bought because they are cheap and available rather than what is best for the piggies. However, education is a key part of rescue work and I have had many piggies adopted from me where people have understood the welfare message and changed their bedding arrangements accordingly. The bedding issue though is just one small part of the information gathered in order to make a good decision.
If the next step was to undertake a home visit then I would have told you already what was involved, we would have already built up enough of a relationship to put you at ease and see it as a good opportunity for both parties to informally chat and learn about each other's expectations. There is no pass or fail, there is no judging. If I felt that a home was after all unsuitable I would be tactful, honest and explain how things could be made better.
For example someone may have told me their hutch is 4' but when I arrive it's only 3' - it happens . I'm not prepared to rehome to that size hutch but with a little imagination and some DIY skills people have added extensions onto their hutch making them well over 5' and quite palacial and subsequently adopted piggies from me. With some explanation people realise that what they intially thought was ok is inadeqate, again it's all down to education really. Having an open mind and a willingness to be guided and make small changes.
For me the home visit is essential - I try to tailor each visit to the needs of the individual and I would say I've never made anyone uncomfortable, after all I am an invited guest in someone's home.
I like to think as someone who may possibly share my passion for piggies the friendly approach is easy anyway. Quite often I visit homes where people are already piggie owners and they are delighted to show me around and introduce me to their existing piggies - show off their homemade hutches, they like to chat about their piggies, how they got them, piggies they have had in the past, show me photos, they are just glad to be able to talk piggie sometimes without boring anyone to death ! - so it's not all one way, we all get something out of a home visit.
Perhaps your question about home visits should be turned on it's head - Would you want to adopt a piggie from a rescue that DIDN'T undertake home visits? Is that rescue really taking the right sort of care to ensure the piggies safe and happy future? That is perhaps open to debate?
So please don't worry about "home visits", in my experience (with dog/cat/piggie rescue I've probably done around 250 visits too) they are a huge benefit to the rescue, the adopters and of course to the animals. Think of it more as an acquaintance popping in for a cuppa to talk about your animal experiences and it's a brilliant chance for you to ask questions too.
Hopefully other people here on the forum show that their experience was a positive one O0
It really is a matter of people working through the process - together.
