She wouldn't be "sacrificing her family".
She can move out and tell the truth and behave like with integrity. Then it is entirely on her parents whether they choose to sacrifice their relationship with their daughter because of their homophobia.
Yes, I think it is far preferable to walk away and stand on your own two feet and know that you did nothing wrong, you did not lie or deceive them and pretend to be someone else, and any relationship breakdown that might occur would be entirely due to their unacceptable behaviour.
As it stands OP is proposing to continue to lie to her parents, live a double life, deceive them because it's very "comfortable for her living standards" even though she can afford to leave. To marry someone without inviting them or even telling them. No, I wouldn't do that.
She is trying to live to separate and mutually incompatible lives at the same time and in the process damaging both of those possibilities. Her parents will respect her honesty far more. This pretence can't be kept up forever. The impact will be far worse when they inevitably catch up with reality if she has also lied to them. Reprehensible as their "views" are, our responsibility is to ourselves for living a life with integrity and treating people decently, or deciding to have no more to do with them if they cannot return this.
Disrespecting her parents with lies in return for their disgusting prejudices will result in no good outcome, it will make everything else. As would rushing into a marriage with someone she barely knows really, while very young, so naive she doesn't even understand what the laws around marriage are and its purpose, and has never lived independently.
So, yes, I absolutely would do exactly what I've said all through the thread: move out, live independently, tell her parents the truth, grow up and act like an adult and treat her partner with the respect to at least openly acknowledge her existence and pursue an actual adult relationship with her and then consider marriage if they are both together and happy still in several years' time and both still want this (having educated herself on what a marriage contract is).