Those typing tables have been used by garment sewers for sergers. Sturdy, the fold up surface and wheels make it easy to roll out of the way. And since the sergers are often have a bit taller base, the lower height works well. But that lower height brings up the question of if you can roll it close enough to work comfortably with whatever chair you will be using. It's well worth trying it though.
I too would be keeping an eye out for an old hospital bed table. Nice and sturdy, adjustable height (I think?), room to put your tools and maybe a light if needed, not so top heavy that it and the machine might be too awkward to move out of the way.