I feel like everything hinges on why your family is avoidant. Have they given a reason? It's at least worth considering that maybe there are some serious red flags you're ignoring. It may be prudent to talk to friends who know your girlfriend to see if they can corroborate any issues you might be blind to, and if these are serious issues it may well be worth reconsidering the relationship.
On the other hand, it could just be something petty, like race or class bigotry. If that's the case, you just have to make a stand. If you're serious about her, this will have to come to a resolution sooner or later.
But it's really impossible to give sweeping advice without knowing the reason.
I've bought a few things recently, but one that really sparks joy is a 3DConnexion space mouse. Bit of a learning curve, but now that I'm used to it, the QoL improvement in navigation while 3d modeling is huge.