The number of photos I’ve seen of completely melted filament rolls, due to either poor oven thermostats or inattentive users … I cannot endorse this technique.
If you’re on a budget, probably better to just power up your heated bed, with a box over top, and dry your spool inside there.
Repurposed food dehydrators seem to rate highly, if you can find a used one for cheap.
I ended up biting the $40 bullet and grabbing a Filadryer S2 when it was on sale.
In the United States, at least: There are retail stores - brick and mortar, I know! - where various “beauty supplies” are sold. Find one where they sell hair bleach etc. They will also sell hair shears.
I got the second-cheapest set they sold, for around $25. For our amateur purposes, these student-hairdresser-grade shears are more than adequate.
I cut my own hair probably 6-9 times a year, and those shears are still the sharpest things I own, fifteen years later.
(Shears are actually really specific cutting tools. Mine have only ever cut hair, which I credit for their long life)