That would be one hell of a cross country road trip! But it would take finding a buyer for the 98 528i first as there will be no financing vehicles at this point, just add that to some $ from the savings account and it would be doable. Unless you want the E39 528i!

All new front suspension, rebuilt the head with new valves/valve stem seals just after Christmas, etc. (but I'm not sure you're quite ready for the monster 189 HP of that beast)