honestly, maggie, i don't know how happy is yr mom when she knows u r marrying a guy which never shows up in a chinese new year day visit for last 7 yrs, as you are talking about the happiness of your parents. if she let u marry this guy, then she knows what a son-in-law to be expected.
but then maggie, if you really wanna help, there is something you can do and it's called "good lie"
#1, either tell your mom that since yr bf (or his family) is not from a wealthy family, and you guys need to buy your own housing after the marriage, pls let her understand the situation that yr bf will have to save those $ just for yr own future usage.
#2, you pay out the "lei gum" from your own pocket and tell your mom that they are paid by yr bf |