My suggestion is to stop the gut of the bathroom until you have not only thefinal design, but all the new components. Demo doesn’t require much time, so it should wait until you know exactly what you want and the price for each thing in the project. We had the toilet in its box on the back porch, we had the cans of BM paint, the custom sconce and the ceiling fixture, the floor tiles and the charcoal grout, and had the custom framed mirror. We had scheduled the plumber and the tile man. We did not tear out anything in the powder room until I had the design and all the materials on my property. What if your vanity takes six weeks, what if the toilet is on backorder, what if the tile is delayed? Luckily we had everything for our powder room because one week into our project, the COVID shutdown stopped everything. Our project continued unfazed and my powder room is exactly what I wanted and how I designed it. We were in construction so know about shortages, delays in shipping, and price increases. If you design first, buy before starting, and wait to demo, you have a better chance of bringing your project in on time and on budget.