A cheap falling target can be made from a box with 1″ hole and a least a 1 1/2″ balloon inside with a string attached to balloon.
Balloon pops target drops. Vary size of balloons to increase difficulty or use multiple balloons.
Small box with IDPA target attached, add a T-Shirt for more realism. How about several balloons with different strings at different angles of hanging attachment. One balloon pops next balloon keeps target from falling and string at different angle causes target to swing and move.
Add a little water to balloon before inflating to add weight if windy to reduce movement.
Think outside the box!
The variations are endless.
Combine with some of this guys four different videos.
Sure not as great as programmable high end systems like this from Jedburgh Target Systems, but much more affordable.