Personally i would look at ryobi's 2x18v mower(which i am lol). They have cheap batteries, cheap chargers, cheap support tools. You can get a string trimmer/edger, a chain saw, a pole saw, a leaf blower, a hedger, not to mention all their other tools that are great.
Ya not "pro level" but you also dont have to sell two of your kidneys. Besides a pro tool is 2-4x the price, is it 2-4x better?