ok i think you need to look around a little before contemplating this engine swap too much
can you weld, properly ?? i ask this because it requires a chassis mount moving for most folks, for other folks it requires at least a new engine mount fabricating to bolt to the engine due to the location of the injector pump
yes your engine and the new engine will require an engine hoist of some kind unless you wish to spend the rest of your life suffering a damaged back (or are built like two brick ****houses), even with a hoist be careful of creeping hydraulics and swinging the engine around whilst trying to move it whilst suspended, i use a hoist to swap landrover engines in and out on my own and straight swaps or 200tdis are relatively simple, other models require more thought and possibly more skills