Can I (26m) prove the fund instead of my girlfriend (24f) for a schengen Visa when traveling together?

Upvote:4

Yes, you can provide the funding.

Regarding the edited bullet points:

You cannot establish her willingness to leave the Schengen area since you cannot make her leave. Making such a promise won't be helpful.
You can establish where the funding for her part of the trip comes from and that the two of you have a stable economic situation with your company. A household income of $2,500/month looks quite good.
I have no experience with any such service, but there are plenty of stories from people who were advised by "visa agents" to lie about their situation. Check everything that goes out under your name very carefully.
Keep it simple, keep it truthful. Any stories of specific consulates deviating from the Schengen rules might change with personnel reassignments and administrative shakeups. Besides, you likely qualify for a visa from the financial viewpoint anyway.
- Decide which Schengen country you want to visit and why. Then apply there. Don't make it look as if you want to enter just any Schengen country that will let you in.
- Plan your itinerary. Are there any events or times of the year you want to see? Scandinavia for hiking in summer or for winter sports? No long stories in the cover letter, but a coherent trip.
- Going to a country with an established tourist industry could be a good idea, but many Schengen countries have that.
- Since Europe is closer than South Korea, make the trip not too long. You seem to be spending 1/3 of your income (before taxes) on travel.

o.m. 34673

Source: stackoverflow.com