A square column mill-drill such as the Rong Fu 45 or its clones is another decent choice for a home shop. Prices, new, range from about $1500 to $6000 with the high price including a Taiwanese machine, with power cross and power downfeeds and a 3 axis glass scale DRO. These weigh 700 to 800 pounds. They typically handle a slightly larger work envelope than the 2/3rd size mills and are capable of working within .001 once properly setup and carefully used. These are R8 machines, and a significant step up from a round column mill drill since they'll keep location within a few thou. if you move the head up and down.
As you might suspect, they lack the rigidity to take heavy cuts. However, in this respect they're not much different than the small Rockwell or Clausing units. They also don't have features like single shot oilers, the scraping of the ways is a joke, and they probably wouldn't last long in production. But unless you find a used machine in good shape, you might do better with a new machine, with a power feed, and a cheap DRO for as little as $2000. Properly cared for they should last for many years in light home shop use.
With a little bit of rigging ingenuity a single person can put one of these just about anywhere.