Many people already suggested you to build a cheap air filter which is much stronger than the one you linked and much cheaper in operation.

The next thing I would suggest is (especially if you have pets) is to buy a robot vac. That significantly improved my home since I have a dog. It runs Monday, Wednesday and Friday.

It made a huge difference for me. I suggest getting the Shark AI because it is bagless (cheaper operation) and has a HEPA filter. That said, the software/app is total crap. Marking specific areas to vacuum doesn't work and it seemingly only works based most on the map it created, instead of relying on sensing as well. People move stuff in the home!

https://www.amazon.com/Shark-Mapping-Capacity-Bagless-AV2501AE/dp/B08QZVSC8D?th=1