I bought a very heavy folding banquet table for $10 and used it for years. However,, I ran across a great sewing table with the dropped surface that my machine fit perfectly! $80 at a rummage sale. I do NOT miss that banquet table. keep in mind the size of your machine and make sure it will fit into any pre-loved tables you may run across on CL, etc. Maybe ask machine dealers if they have any leads on used furniture as people upgrade to larger machines that no longer fit their furniture.
an idea, if you have handy men with jigsaws, you can buy nice, sturdy wood tables and he could figure out out how to retrofit the dropped surface or add the lifts. Or, to make it easier....save and buy! Tailormade and Arrow are "affordable". Koala is top is TOL in price.
I drool over sewing machine furniture too!
sandy