Cheap toys takes a creative mind and an open one two. I found a great spreader bar for $10 at wallymart in the car section. It is adjustable to length and has these 2 chrome boxed ring ends on it to hang it in your car but it works well for other things too.

Dog collars and large clips work wonders also you can buy a lot of chain for tethering the dog outside for under $5. A belt can be use for a lot get a long one to wrap around legs or body several times and then buckle it behind her.

For years I had a large plant stand shelves that worked very well as an Aframe when the shelves were taken out

Silk ties, 2 boards a hinge and fence loop and hasp you use a saw to cut out 1, 2 or 3 holes sandpaper down the edges and you have a stock for about $14
actually you can 4 holes and it will hold her wrists and ankles getting that pesky board out of the way of getting to her mouth. flip her over onto her face and the promised lad is right there 2 holes no waiting.