If it were me, I would reach out to other franchisees in your area (perhaps your Development Agent might have some insight...see...I know the Subway lingo and I've done Subways in my banking days).

You good contertops and do a tile back splash with some color I think white subway is becoming a bit dated.  

ARV 900Total reno was 170k Appraisal $399.00 Shut off valves $95.75 paint $300.18 Commeercial enzyme cleaner $72.09 Water activation fee $51.38 shut off valves $38.52 Kilz restoration primer $275.66 Kilz restoration primer $150.33 Shower tile-Master.

@Timur Salikov In NYC, $1,500 gets you a 400 sq ft apartment with a subway station under your feet and crackheads outside your window.

I recently watched a video where Troy Kearns mentioned he could source a high-quality quartz slab for $100 from China, which got me thinking about exploring similar options.Has anyone here ever imported materials like hardwood floors, countertops, or tiles from China for a project?

Being in the right area, especially near a popular train/subway station, makes a huge difference in the value of a property.

He is also planning on a tile accent wall.  

Tile throughout.

Zellige tiles.

Every little thing in the project should be in writing, even down to the door stops :-) See my tile spec sheet below ...Two problems with your post though - 1) In my experience, most problems come from the customer changing their minds constantly.