We have (but don't use) Room Planner so I don't know how this might work for you but we recently purchased a Disto S910 (in the pro pack) and absolutely love it. You can use it like the lower cost Disto units but you can also use it like a simple theodolite total station for gathering data. We can do a quick as built or a basic survey. It can put each shot in live or create a dxf file with photos. I love the fact that I can measure any vertical or horizontal item from one spot on the ground. Example: we end up working in areas of Scenic Rivers or Landscape Management where we have to identify all ridge heights, chimneys, stove pipes, vents and satellite dishes on the home and the exact height from existing grade. We just did this last week on a home and also captured many architectural features a few inside measurements as well as basic topography, driveways, visible utilities, nature trail and property corners. It took one person about 75 minutes and no one had to get on a ladder. The accuracy is staggering, between 1/32" -1/4" at 1,000 feet.
We have done 3 as-built drawings for remodel projects since getting this tool and it has move than paid for itself already.
https://lasers.leica-geosystems.com/disto/s910
best deal I have found
https://www.amazon.com/Leica-S910-Distance-Measurer-Measuring/dp/B00UP2WAFG