I assume by "you" you mean anyone who is not coinbase or blocktrades or similar, just a guy.
The first question you'd have to ask, is not to me, the potential customer to such a service, if I'm interested, but to yourself, if you can provide the level of security and regulations VISA would ask to allow payments via your business.
Of course you need to know if you'd have a market. But at the same time you need to worry if you can be in such a business.
Why do you think so many exchanges don't have fiat as an option? Because they don't want the hassle that goes along with the regulations for providing fiat payments.
Many questions, many answers. First a disclaimer. I am not testing the market to take the open slot myself. I am trying to spread the idea and ask the right questions.
Second: using a visa service on a personal or small business scale is very possible. Many fintechs do the technical parts. As for making it legal, there should be a country in Europe (not necessarily Liechtenstein or Andorra) where you could.
I believe in the existence of a market: I would be a customer provided I can trust the service a little
I also believe coinbase and friends are under heavy legal constraints that forbid them to accept fiat, that's where individuals may get the power of small scale and decentralization. That's where I like the idea of localbitcoin