I would love the idea of a model shop a few miles away. As I did when Graham's was there in Port Laoise.
But, it needs to work for you, before it works for us.
I often look at rents for retail outlets and work out how much an hour you would have to make before you got anything for yourself.
Shops where there's a huge variety of potential products are more of a problem to run than places selling a limited range of 'standard' goods.
This is all mere conjecture from someone who has never worked in retail*, so take it all with a sack of salt.
* If I had worked in retail, I would be in prison for assault by now...