As Keith alluded to,his requirements are different from someone else's. Back a few years for me,even the gas to go get that mill was a tax deduction. Everyone needs to understand this,and it ain't just about equipment. I learned it from my wife about children..... they're all different,thank the good Lord.
Along these lines.... even a clapped out,peckerhead swiss cheesed table,can be of value. Think blacksmith shop,think welding shop,heck....to a typical weekend warrior wood worker a milling machine can open doors they never dreamed of.
Buy used,sell used. Also,like real estate.....location,location. In the N.E. states selling any mill is gonna be different than say Iowa or any "dry" area. This may not mean much to some folks who's $$ isn't at issue. But for others,raising families,working their butts off providing..... the chance to have nice hobby equipment is a DANG luxury. So the ability to sell it quickly can come into focus.
Powermatic has a medium towards the soft side on their cast iron generally. Machines well and has OK weldability. Get your ducks in a row for rigging..... nice HD straps,some 2x4 blocking and screw gun. I like and use pipe rollers. Flip head if possible and lower table all the way to lower COG. Mills generally aren't quite as "tippy" as newer,gauge metal based lathes but still can go over. No quick elevation changes whether moving manually or with equipment. Look in the manual closely,it may show rigging points. Most knee mills have provisions to rig from an eye somewhere "up top". Take your time,it ain't a race when moving.