can someone tell me how they would charge for this service?

[Realitea]

I've been asked to check in on a property every 3 months while the owners are away. If there are any maintenance issues, to report to them and sort them out.
I'm used to charging per hour for maintaining peoples second homes and it's usually cleaning..so how would I charge for this?
I have to meet the owners tonight so any replies before then would be really appreciated! thank you

£25 per visit if local plus an hourly rate if you have to sort problems out?

I own a flat (rented out) and the whole block is owners who rent out. We own the freehold too. We employ a guy to do such checks but his deal is that we pay him 10% of whatever the repair is so if a £60 repair he gets £6 but if it was an £800 repair he'd get £80.

If it is friends I'd agree just an hourly rate plus any expenses such as phone calls etc.

Sounds good. Thank you!