aworker of wcp or anything like that really is fine, i prefer aworker myself,
im of the school of if you dont need to update or replace don't, i have a top spec laptop for myself a i pad and a pc that is 10 years old, the pc does everything i need for the window cleaning business just as well as both of the others, by all means buy yourself a new toy, but for the business you dont "need" it