I truly do feel for you. I have a 09 R56 and I had to put a bunch of $ into her, $1700 to have the AC fixed that was a broken Actuator which requires the whole dash to be removed then I had a oil leak around the valve cover but did that one myself for a decent price also had a coolant leak which lead to replacing the radiator and hoses $1500 but other than that I do the oil changes myself I keep up with plugs coil packs and know she runs like a champ. I felt the same as you at first but mine only has 75,000 miles and I refused to give up on a car I absolutely love. So I do hope you hang in there, I would just take it to GT peace if I were you they are great there and you will not regret keeping your mini. And like me I knew purchasing a mini that I would have to put money into it and just accepted it, I hope you do the same. Good luck!!!!