Using “very small” as the main criterion, I’d suggest this one from Craftsman. It has a shelf underneath that’s perfect for storing kits. It’ll hold the weight of a Sportster motor, so it’s very sturdy:
The drawback is that it may be pricey for some, and far sturdier than necessary for modeling.
In that case you can build your own. I am almost as adept at manipulating molten metal as I am gluing bits of styrene together, so it was a pretty simple affair. One inch square tubing is available at any Ace Hardware or similar store.
This doubles as a foot stool and a miniature reloading station during football games. I have done modeling projects on it as well:
Once the top gets too boogered up you can simply replace it:
And if course the whole thing is portable - you could put a hotel modeling tool set in the box - compressor, Dremel, tools and supplies, or in this case everything necessary to reload four different calibers. I even enlarged the hole on the metal handle to serve as a beer opener.
If bending over to work while watching NetFlix isn’t your thing you can graduate up to the next larger size - again just a few dollars to make, other than the granite. Of course two 2x8’s are a perfect replacement. Armrest height is little more conducive for modeling. I like it because the granite is extremely flat and good for wet sanding.
Then there’s the granddaddy of homemade workbenches - just right for regular dining room chairs and has a shelf. Top can once again be made from wood as well:
If welding isn’t your thing you can do the last one using one inch PVC pipe and T fittings. With a few more fittings you can make a shelf as well. The whole thing can even be only partially glued together, so that you can disassemble it for travel. The one I did is at the in-laws, so no photo, but I’m sure anyone can come up with their own design.
Ah, I forgot the most important thing - when not being used for modeling, you can actually use them as end tables! 
Ah, one more that I got from Harbor Freight:
I sort of keep it hidden because it looks much like Einstein’s desk the day before he died…
When it’s cleared of projects it’s actually a nice little piece of furniture. Matches the wooden floors and all, which is important if you want to keep the wife happy.