I like the idea but its a mere dream - but then you're coming from America, the land of plenty - and your country has a lot more home brands and metal vacuums than the UK. Adding another from a vacuum cleaner enthusiast opens possibilities, but financially I think it is precarious - unless a whole boat of collectors get together on here to open a manufacturing base and start putting out a unique vacuum cleaner that will satisfy buyers - I don't think that is possible unless you consider rebuilding other appliances - such as a "retro" line of vacuums, kettles, washing machines etc. It is do-able but if you just concentrate on vacuums alone, you're still going to need a huge investment behind you including a parts division, not to mention patents and permissions from existing brands.
A small home business could work but then you'd also have to declare the tax you're making off the products you sell and be able to have enough investment behind you to pay out for any parts that get broken. Even if you build the vacuum up in question to the highest quality etc, you may end up paying for those who buy from you, if it goes wrong in less than a year.
I think generally that even if we are vacuum cleaner collectors - at the end of the day - it is an expensive hobby that doesn't normally pay out unless you, yourself has sourced rare examples of vacuums that are sought after. Buyers don't generally like to be educated these days, either when it comes to costs. They'll usually just jump at low prices since most of us are living in austerity.
