If you are wanting something to do the specific jobs that you're telling us then you are gonna be a lot better off; either having one made from scratch, or use a second hand one, which you can pick up pretty cheaply these days, n have it modified to suit whatever needs that you want it for and also maybe incorporate a few different things into it so that it would make it a more suitable vehicle for whichever specific job that you want it to do mate!! N that's not gonna be costing you a fortune if you use the right vehicle and you've got someone that at least knows what they're doing and not someone that thinks they do!!!!
So if I can be of any more use then just give me a shout pal!!