Hi there! I'm a
thrift store junkie like you as well. I've always wanted my own thrift store too. However I do know it would be a lot of work and have a feeling the fun I get out of thrifting may not be the same as actually running a thrift store but I still day dream about it sometimes.
What I do to fill the void is sell thrift store stuff
online. Mostly eBay of course. They have the traffic that you can't beat. You can open your own online store. There are lots of opportunities these days. With online the world is your audience and overhead is low. But good luck!