If you need to employ someone for a particular service (such as a babysitter, gardener, electrician or plumber) here are some useful phrases.
Asking about availability
Are you (Would you be) available to babysit / do some gardening / come and check our boiler tomorrow?
Do you have any time this week to come round and check...?
I'm afraid I have an urgent problem with the wiring. Can you possibly send someone round?
Defining the work or service
We need someone to come round three times a week to keep the garden tidy.
I'm looking for someone who can look after the children for two evenings a week.
I think there's a problem with the plumbing of the washing machine.
Do you fix boilers?
Asking about pay
How much do you usually charge for an hour's babysitting / work?
How much is the call-out fee?
(Some professionals, like plumbers etc, charge a flat fee to come round to your house, before they do any work)
Do you have an hourly rate?
Saying how much you can pay
Well, I can pay you ..... per evening / per hour.
How does .... sound to you?
Would you be happy with ...?
Does .... sound fair to you?