Let me first say, congrats on successfully starting your own business! I kind of stumbled across this thread and read it from start to finish. I find it interesting and thank you for your open sharing of your experience.
If I may, I would like to just point out a couple things as an outsider looking in. You do say you are aiming to target the high-end clients? You want a more upscale / quality service driven business am I correct? The big glaring issue for me would be that as of today, your store has been open for exactly 4 months (from March 22). It took quite a while to get your sign up and if I am reading this thread correctly, you still are only 60% complete on construction in-store? I dont know about everyone else, but I would really question the image you are pushing if I have been a customer from the beginning and 4 months down the road still walk back into a construction site. You said you had mentioned an issue with your builder, fair enough. But please keep in mind, first impressions are everything. I think you should really drive to get the place finished up. You dont want months of half-assed looking shop to go on like this.
My 2c.
Anyway, please keep us updated. I really hope you have continued success.