See Tesla's market cap, it's $25B http://finance.yahoo.com/q?s=tsla&ql=1

See 'total cash', 'total debt' and market cap: http://finance.yahoo.com/q/ks?s=AAPL+Key+Statistics

Apple does not have enough cash and giving away too much stock in a cash and stock deal would give too much control to Telsa holders.