If your going to be working in Shenzhen, how is it that you can live in HK, let me ask the visa question, what visa will you have to let you live in HK and work in SZ.
If you really can live in HK and need to cross in sz everyday to go to Boa'an, it is in your best interest to choose locations on the west side of HK, places like Gold Coast / Tuen Mun, Yuen Long and Tin Shui Wai. These locations will make life easier for you so that you can use the Shenzhen bay crossing into China, lot less ppl use that so its faster.
If you cannot live in HK due to visa restrictions then the best place for foreigners to live is in Shekou, in the area around seaworld, lot of foreigners there, good food, good bars and live bands, according to the SZ Metro site, it will take you close to 50 mins from seaworld to bao'an but only cost 7rmb, now thats cheap. By taxi around 32 mins (no idea of costs).