I hear ya.
Your 6ti is perfect for that. And if you really get into documenting more extensively in the future; remember that lenses are key. I still had my 10-year-old Canon T2i until a year ago. Was noisy in low light but slap a nice prime lens on it and it shot great in daytime. I still regret getting rid of it.
Rigging a frame for your camera to shoot downward is not difficult, and relatively cheap. A base plate with a quick-release to mount the camera body, maybe a
cheese plate for attachment options, some 15mm clamps and rods, and your almost there.
When I started rigging my DSLR 10 years ago I used to get a lot of small components here >
Camera Rig, Camera Stabilizer, A6500 Cage for Worldwide Filmmakers
Now you can get most of these through Ebay or Amazon, but browsing through this site will likely give you a lot of ideas about how to mount your camera.
Rods:
Camera Support - Shoulder Rig - Rods - Page 1 - coollcd
Rod clamps:
Camera Support - Shoulder Rig - Rod Clamp - Page 1 - coollcd
Plates:
Camera Mounting Plate, Camera Plate, Camera Quick Release Plate, Camera Plate DIY, Arca Plate for photographers
Stuff like this, and either a wooden bounding box around your work table - or used light stands (Ebay) and you're all set. You COULD go for an all-wood frame, but I’m confident you’ll appreciate the versatility of the rod/clamp solution which will allow you to relocate your camera more easily.
As for having too many projects: been there/still am there. As silly as this may sound, what helped me is LISTS. Get a free desktop TO-DO LIST widget for your computer and start realistically listing what’s on your plate. Add deadlines if you need to. And like
triaging photos, separate tasks that you believe will realistically help you move things forward from
fantasy tasks that require more time and budget that you currently have. It took me about a year to respect that process, mostly because It’s difficult for an
old dog to learn new tricks, but now I’m way more efficient than I’ve been in the last 20 years.
Hope this helps!