I use https://floorplanner.com for similar purposes (I pay $5/month). It is great at getting the floorplan nailed, but leaves a bit to be desired when trying to fill the space with accurate furniture, patterns etc. You can have multiple variations floor plans per level.

My gf uses https://foyr.com once we have the floor plan nailed to get an idea about what colors, textures & furniture to use in a space. It supports higher def renderings. It's kind of expensive though iirc.