I think you need to decide if you want an employee or a subby don't work out ways how you can beat the system cos it can come back to bite you
But end of the day all you need to do is pick up the phone And speak to hmrc
As a matter of fact There are some big firms hiring out there own vehicles,
Like taxis company's so I don't know...
I understand where you're coming from you want someone to work for you but so that you won't be responsible as an employer , and all the extra taxes and holiday pay etc
Well the only way you can do that is if you hire a self employed person with his own tools and van,
Why don't you do one of 2 things
Offer this person a 0 hour contract that way if he isn't your cup of tea
Don't give him any more hours , again speak to hmrc or your accountant if you use one for more info on this,
Hire a Subbie , to help with the harder days maybe and you personally go and work the others until you find your self in A better situation to do what you need too
If however you have the motivation or drive I think the first option is a better method to grow your business this is because you can set out hours for a full day
For example cleaning 9-3 door knocking 3-5 makes a full working day, I do say the word motivation because you can't just leave your employees alone you will need to manage them if you havnt got the drive or maybe not just now and you still want to hire then I'd stick with the 2nd option