I disagree. If you have one of the PC/Dewalt/bosch combo bases, you can
permanently mount the fixed base on your plate and use the plunge base
for free-hand routing. This is what I am doing right now. The fold down
table Idea seems fine to me. I actually have a fold down table like
described, but my router table is built into a nother bench. Go for it.
Caution: Since you will be having a heavy, sharp, whirring blade, you
should look at how well your legs lock in the down position. If they
can be kicked out in any way, you risk serious injury.