I'll add one more thought: I have a full size knee mill in my shop. Next to my 2x72 grinder, it's the most used tool in my shop. I use it for making knives, making other tools for making knives, and several other odd jobs. I couldn't begin to imagine using a benchtop mill for much of what I do, and there are actually many instances where I wish my mill was larger!
Personally, I bought mine used from a machinery dealer about 2.5 hours away. They dropped it off with a truck with a lift gate, and rolled it into the corner of my shop with a manual pallet jack. I had to tilt the head 90 degrees to get it into my garage, and the pallet was a little tricky to get out from underneath it, but at the end of the day, it was relatively simple. If I need to move it across the shop, a 4 foot pry bar and 2 or 3 pipes are all that is needed. Machine dollies or an engine crane would be useful to have, but not necessary. I say that just to say, it can be done.
Now, if you know you're JUST going to do basic folder work, then yes, a benchtop mill is certainly better than nothing, but there's definitely a lot to be said for having more weight, more power, more rigidity, and more capacity, even for the "small" jobs.