i was charging 1.25p per item with cert and any fuse change that needed changing ..seen soooo many table lamps with 13amp fuses and if it need new plug-top,stress grommits,cable all charged at going rate per mtr.. min order was 25 items at that price .. anything lower was charged at 3.50 + parts if any
building sites as well alot of them now need to view pat cert for tools /110v/240v tools and chargers all need pat tested before thay are used onsite... and all tools are tested every 3 months on building sites if you start doing bulding sites turn up in van goto office ( make sure you got hi-vis,hardhat,boots on )offer them your service some do have there own pat tester onsite... if you do get onsite make sure you got artic cable,stress grommits,plugtops and 110v plugs & sockets
all charged at going rate ..