Directory Listing Website - Partner/Advise Needed

Hi All,
I'm in the process of setting up a local directory listing website.

I am based in the UK, plenty of experience within the sector I am looking to target. There is a gap in the market, particularly within the UK, whereby agricultural/equestrian services are not particularly well advertised.

The majority of product (such as horse feed) is through word of mouth, or local supplier. Little comes up on google from these places, many do not have websites. Facebook advertising is very popular, but again - you need to know which closed groups to be part of, etc.

Therefore, I feel there is a gap in the market to start a directory listing site (think, Air BnB, Yellow Pages, etc).

I have a strategy to get this rolling, but I feel my technical ability to get this started is going to be my stumbling point. I'm looking for advice on good domain registration sites, hosting sites (to deal with traffic, as well as space for users to upload photos, etc).
I also want recommendations on directory templates, or should I be using WordPress with a Directory plug-in, etc.

I am potentially open to partnering with someone who has a genuine interest in this project, but that can be discussed.

Any advise or suggestions welcome!