Looks like a good plan, Denis.
If you are going to have enough room to have the washer and dryer side by side, you might want to build a pedestal under them (or have one built). I saw quite a few plans for them.
This is a rough one that has a pull-out shelf to set the laundry baskets on when taking stuff out or putting stuff in the machines.
I saw another version in picture only that had two slides...
or someone went super fancy:
When relocating the dryer, did you think about the path for the dryer's vent?
It seems like it vents out the side of the house for now, but if you move the appliances, you will need to find a new path for the vent that will go outside of the house. It should be somewhere that you will be able to access to clean out any lint that might get stuck in it.
When shopping for stuff, you might want to try a Habitat for Humanity ReStore if there is one in your area because they usually have lower prices or try something like Surplus Warehouse (again, if they have one near you). The one near me sells Maax shower units.