time is a big thing, when are you going to interview, go round meet all your new customers, trrain youre new staff, go back collecting and keep an eye on monies owed, plus other things, its all very time consuming, but if you can find the time and think it will work it may be worth a try, but you need to know the business more than youre staff and in this case i dont think it would be that way, also to get someone to do it part time would be hard although not impossible, people either want full or part time work, not part time till theres enough, when employing, just to start up you will need to provide them with vehicle and equipment, and the ongoing costs of insurances etc, so a fair bit of money to set up which you may be able to fund, good luck, it may be possible but it will be hard, where abouts are you in uk?