Long story short: some family members have come into some property that has a horse barn with 20 stables and a 100 yard show arena. The property also has 2 horse pastures at about 5 acres each. They're not sure if they want to use the building for horses or remodel it for a party/event venue.

Is it possible for them to just lease the space to a trainer/care taker and fill up the stalls with minimal involvement from them? I.e. here's the space you can use for $X/month. Go find people to board their horses.

How much do those people get paid? How much would people pay to board their horse? Is there expensive insurances involved?

Start up costs are almost nonexistent because there's already a building, pastures, and 3 horses that have been there from the previous owners for a few years.