I would imagine Google Sheets and Apple Numbers free spreadsheet products could do the same.

Excel is capable of being a simple drawing package by setting up the spreadsheet cells to be like quad ruled graph paper (squares), then adding lines, rectangles, color, text etc.

I use Excel spreadsheets for quantitative analyses, and also use Excel for simple floor plan and elevations to start, before going 3-D (to more quickly view and evaluate 2D design choices). Their product illustrations show more detailed examples if you spend more time adding more complex details to your building. See my own examples from the $199 product attached. Or the full professional Chief Architect product is $2,700 or $199/mo. You can rent the highest Home Designer $499 version for $59/month if you decide to get serious and build one of your plans but don't want to spend $499. This series is far cheaper than Chief Architect, with versions selling for $99 to $499. Their Home Designer series of products for non-professionals may fit your needs. Chief Architect and has a wide range of products and prices, so can be affordable to fit your budget. I agree with Jason and William that Chief Architect is intuitive and useful for 3-D renderings, provides many built-in objects to use to create a building, furnishings, landscaping etc. They can regenerate the thing more precisely and in less time within a template pre-built with standard detailing, company standards, bells, whistles, & what have you. AutoCAD dwg's can still be imported into Revit but most pros won't bother. For proper documentation most in the industry use Revit or ArchiCAD now, but there's quite a steep price and learning curve on those for a hobbyist. But it has its place in conceptual schematic design.

Mostly because it's TERRIBLE for generating construction documents.

TBH, I hate Sketchup but it really is the simplest and most intuitive 3D modeling tool to learn and visualize ideas. I haven't used it in over a decade but it was fun for cobbling together builder-grade house models and plans. If Sketchup isn't to your liking maybe try out Chief Architect. Make any pros you work with do an import/export if they really want to reference it.

Sketchup vs home designer pro