I think you’ll find that you are right it works in all types of industries what you are failing to see is that window cleaning or Oven cleaning is a simple business,you don’t need to invest 1000s upon 1000s of £s to get started or make it work.
If I come to you and give you 20k and you start off by giving me 400 notes a week worth of work and can guarantee that and that you’ll get me ongoing business and replace any lost work due to my initial incompetence we have some sort of deal,if I come to you with 20k and you sit me down tell me how it’s done give me your livery to use a few T shirts and business cards-flyers who’s the stupid one there then,KFC might want 750,000-1,000,000 off of you “why” because you know and they know you’ll make it back and be into big profits in a few years even though you still have to pay them for all there products plus a franchise fee every month,yes all franchises work but without a brand that’s visible in the high street you ain’t any different to the next window cleaner.