What are you offering them that they can’t get on there own it’s window cleaning why wouldn’t they buy some work start to work it and build it up you’d have to be a fool,anyone who’s anyone have always started say part time and then realise it could be a good business so they knock doors or leaflet.
This is why after a while they go it alone they start off buying into your business because they know nothing about how it works and how simple it is or can be,as soon as they realise that all you are doing is the same via a website-leaflet dropping or poxy lead generation they will be off into the sunset and you’ll be left will a lot more work to service without someone servicing it,this is why employing works better you need to keep tabs on what’s happening or you’ll just get robbed legal contract or whatever to some people that means nothing.
Can you imagine having the hassle of trying to take someone to court because they’ve convinced customers to drop you and go with them when the customer may actually prefer them,good luck like I’ve said it can work but you have to be very very lucky and careful who you let have a little bit of you’re world,I’d never do it employing they are covered and so are you and employing you’ll earn more long term when they are up to speed.