@Michelle2402 I'm not sure what regulations you're referring to, but Airbnb basically works the same whether a host is renting out rooms in their home or an entire place listing, although there are some "big boys" who have more commercial listings, and lots of them, who do have different rules (more lenient because they bring in more money for Airbnb) about what they can do.
I'm a home-share host myself (just one room), and I don't think it would be a wise plan to look for a property manager. Your dad would be best off if he has control of who books with him, so it jives with his lifestyle, his schedule, and his personality. He also needs to consider what type of guest he would market towards (this is important- the hosts who have the least issues seem to understand that they can't appeal to everyone, nor would you want to, and cater to certain demographics, whether it's tourists in town to see the sites, working professionals, young families, etc).
The first order of business is to find out what the local laws are regarding short term rentals. In some places you can only rent out a certain number of rooms, or only rent for a maximum of so many days a year, etc. Then you or he should also find out about local landlord/tenant laws, so you're aware of at what point someone would be considered a tenant, rather than a guest, because you don't want a situation where someone is considered to be a tenant and you can't evict them if they prove to be troublesome.
Also, hosting requires a fair amount of time to pull off successfully- you have to be available to respond to booking requests promptly, answer guest messages and send them information, make sure the room is cleaned to a high standard, (as well as any common spaces that are shared with the host), and if there are shared bathrooms, the host has to make sure those are kept clean- you can't rely on all guests being clean, and you could get a bad review from a clean guest who found they were sharing a bathroom with a dirty one, if the host wasn't on top of making sure it was kept clean daily.
So if he's too busy for all that, he could still make it work by having a co-host, which would be an individual with some hospitality experience, or even their own Airbnb, rather than some big property management company, wo, as you found out, aren't even interested in anything but entire place listings (and some of which have a pretty bad reputation for being responsive and competent with guests).
I'd advise, if your dad thinks he'd want to do this, that he only think about starting out with renting one room, and then, as time goes on, add another if it's working out for him.
And I'd strongly suggest that he start making reading this hosting forum (there's Airbnb forums in many languages-I know there's one in Spanish, not sure about Portuguese, but you could find out)) something he does for awhile first, so he gets an overview of the issues hosts deal with to get a sense if it's something he wants to get into. There's many a person who thinks having a Airbnb will be a easy and fun way to make money, only to find out it's a lot more work or hassle than they're prepared for.
And not everyone feels comfortable with having a constant parade of strangers passing through their home. If he comes home from work tired and just wants to relax, it may be irritating to have someone else there who wants to chat, or lay around watching TV. But if he's a sociable guy who likes having people around, it might be good for him. As a home host, he can also think about which parts of his house he wants to give guests access to, which is totally up to him. I share my kitchen with guests, but not my living room, some hosts don't allow kitchen use, other than to make a cup of coffee or tea, or make a sandwich, or not at all, it's very individual.
And he should be aware that guests are strangers and they shouldn't just be blindly trusted. The hosts valuables- money, credit cards, jewelry, laptops, personal paperwork, etc. shouldn't be left where guests can gain access to them. I've never had problems in that respect with my guests, but many hosts have.
