I wanted to do the with my 1.6 but was told I need to get custome ECU made as the standard one wont recognize turbo and the engine will blow almost instantly. Custom ECU cost around 2k, so I'm doing conversion

It will come to more than 2k all in but I'll have more power and I'll know it's gonna be reliable. Complete conversion cost me 2k (There is one on ebay now asking price £1900, it's from golf mk5 GTI but same engine with DSG box) labour will be around £1500, brakes £1000, suspension kit £800, turbo kit £2k, you need to spend at least 4-5k to get it done right so most of people will tell you sell it and buy FR but if you love your car like I do do conversion and I'm sure you'll be proud of your achievement
