I'm another of Peter's customers, distance isn't a problem, his after care is fine.
I have the trolley system but tend to use it as a mini-van system directly out of the back of the hatchback.
I take six 25L containers with me, on a busy day I will need to pop home for a top up, most of my work is very local, so its an excuse to stop for a coffee
The system is just about idiot proof, easy to set up and use,.
Peter not always easy to get on the phone, but I have left him texts on his mobile and he has always got back to me.
Most of my own work is commercial, but I haven't had any problems getting around houses.
As you have a full round anyway, make sure you get yourself a decent quality leisure battery, at least 85ah. And make sure it has a carrying handle! If you go for Peter's system, even though it is heavy, you can hook it onto the trolley and use when the smaller, lighter one starts to fade. Also ideal if you end out operating directly out of the back of your car.
Ian