I'm apparently the only one whose immediate reaction was not laughing but thinking, "that is an incredibly inappropriate way for a landlord to talk to a renter."
I mean Jesus what kind of pseudo fake ass decorum shit do you have to be on to argue you need to be proper when talking to fucking anyone that isn't your stick in the mud boss.or company paper trail?
The policy here at my area does what used to be called the Japanese No. That is to say that pets are permitted, as is everything, in exchange for an exorbitant fee.
Enter emotional support animal paperwork. A hundred bucks and an autism diagnosis saves me $40 a month in pet rent and a several hundred dollar pet deposit. Landlords hate this!
I'm pretty sure that only works in New York and California. I don't think other states have laws protecting ESAs on the books, unless it's a service animal.
In Ontario, Canada, landlords can reject your rental application if you have pets but they can't kick you out so I always just lie and say I don't have pets :)
In my country, an landlord owner can not forbid pets in a house unless there are specific rules that completely prevents it (like an HOA imposition, where no animals at all are allowed in an apartment building); it was ruled by our Supreme Court having a pet is an unwaivable right the individual has.
(Yes, most people ignore this and just outright ban animals.)
However, the owner of a house can demand certain conditions to be fullfilled, in order for an animal to be housed there, like the animal being registered (ID chip), licensed (paid annually), vaccinated, properly kept (cages, terrariums or whatever necessary to accomodate, safely, the animal(s)), behaviour (a dog can not spend their time barking their head off, a cat yowlling, birds screeching) and for the guardian to assume full responsability for any and all damages the animal causes.
This part is legal and most people would run for the hills if they found such a clause on a leasing agreement, as for the moment they sign it, they are legally binded by it and failling to observe any condition is legal ground for breach of contract.
Insurance on the property is usually why certain breeds of pets aren't allowed (i.e. "aggressive" dog breeds, exotic animals). It's not just landlords being landlords.
Hairless cats do have certain health risks and need to be bathed regularly (once a week)
In general I would advise you to not buy a specific breed, as they are more expensive and have more health problems than a general "house car" from the shelter
From what I read, breeding Sphynx cats is illegal in the EU or at least the Netherlands. They have a higher risk of skin cancer and the lack of whiskers comes with issues.