I get flamed for this all the time, but there is no such thing as "budget night vision gear" unless its of the SGP kind.
For the kind of money you would spend on a Wal-Mart grade unit (around $90-$150, IIRC), you would be better served, in my opinion, spending the money on a decent Surefire weaponlight.
The low-end units like Wally World carries are cheapo first gen Russian units, usually with poor optics. The ones I have had and played with all gave me more eye fatigue than advantage, and in some cases enough to cause headaches from eye strain.
Keep asking around and search some of the Night Vision "depots" out there - sometimes you can find US-made Gen. 2 stuff for a good price - it might not be new or pretty but it usually works just fine for coyotes or looking cool in bathroom mirrors.
Hope this helps,
Clint