Selecting *A for Asia base?
 

I may be relocating to Asia- Borneo to be exact and I'm looking at *A options and would like to advice from *A FT's.

Which of two options offers the best J class for my trips back to US?
1). SQ SIN-IAH, SIN-LAX?
2). UA HKG-ORD, NRT-IAH, PVG-LAX?

SQ will be my primary carrier for my local Asian vacations. What is the best FF program, UA or SQ? I would be in this location for about 4 yrs and then relocated to back to Houston?

A majority of my travel will be with my family. Can I sign my kids 2yrs, 3yrs and 5yrs up for FF accounts and can they get status with either UA and SQ?

Finally, any reason I should choose/consider *A over OW for all of my business?

I know a lot of questions but appreciate the help.