I was home-checked for Esther and it was no sweat (I think the brand new cat towers, food bowls, litter trays, litter supplies, flea treatments etc lying around the place possibly swung it for me, lol), but really they are just looking to ensure you can provide an animal with a safe, caring environment and that you understand the needs of the animal. When I obtained Shadow from the RSPCA they asked all the right questions but did not check. Again, I suspect because I was accompanied by two friends who were interjecting, contradicting and generally engaging in the conversation so it was clear that we were not spinning a line.
Some rescues have an agreement with others that they will accept a homecheck, especially if you are adopting out of area, but the situation is entirely dependent on the relationship between the rescues and their prior working relationship.