For $40 you can have screw jacks. For $30 you can have some lumber and ratchet straps. Screw jacks seem to me like the obvious choice as they are much more versatile. And if one happens to needed adjustments, it’s a silent action required.
Although, if you needed to do something in a pinch, that is a great idea!
I'll get in there tomorrow and take some pics. We have mats, foam board insulation going inside and she's going to get boosted off the ground with 4x4's to eliminate any rocking. Blinds a rocking don't come a knocking