portable-ish air filters

Small filters that are easy to move around from room to room. Canadian prices and sites where available.
Be mindful that you will also have to factor in the cost of replacement filters, as filters typically need to replaced about every six to nine months.

Pure Enrichment PureZone $50
2.7" W x 8.5" H
tiny square foot size

e.g. from the Zon

This is really a personal filter that you would use on an airplane (please check with your airline first).  It can only do a small amount of space around one person.

Levoit Core Mini $50
6.5" x 6.5" x 10.4"
2.2 lbs
172ft² sqft room size

https://levoit.com/products/core-mini-air-purifier

e.g. from the Zon

BlueAir Mini Max $69 to $91
6.8" X 5.9" X 11.4"
2.8 lbs
90 to 216 ft² (sqft) room size

https://www.blueair.com/ca/shop/3654.html

BlueAir Pure 511 $105 to $140
7.9" X 7.9" X 13.4"
4.2 lbs
182 to 432 ft² (sqft) room size

https://www.blueair.com/ca/air-purifiers/blue-pure-511/3560.html

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Levoit Core 300 $190
8.7" x 8.7 x 14.2"
7.5 lbs
219 ft² (sqft) room size

https://levoit.com/products/core300-air-purifier

I mention this because it's widely available but at 7.5 lbs it's not exactly portable.