Luowu-Kaili Hotel-Shen Zhen HSR- GZ Chimelong - GZ Haizhu - HK Shatin

Can I know if I want to go from Kali Hotel (Shenzhen) to Panyu (Guangzhou), which is the High speed train station I should go to in SZ and stop at which GZ station and how to travel from the HSR station to Panyu (please also advise the time and cost)? If I''m going back from Panyu to HK Shatin, what is the most cost effective way to travel ( other than by bus only which I think is too slow). If I''m going back from Haizhu sqaure to HK, what is the most cost effective way to travel? Thanks