If you really mean small, and limited space where you are -
I mounted a vise alone on a HF grinder pedestal (subsequent to the photo below). Free-standing, this accommodates weird shapes.
My 'welding table' was welded up from five scrap TV wall mounts to make a 12 x 36 work surface. There were already many slotted holes, handy to clamp material down. The base is a small tractor rim.
I sometimes bring the vise on its pedestal over to near the work table, for long objects. Each weighs under 50 lbs, so easy to move around.
After using these for a few years now, I haven't found a need for anything more elaborate.