Even from that picture, the cage doesn't look great. Look at the huge gap on the drivers right of the car.

It sounds to me like you're buying this differently than if from someone else. You are seeing value to the car because it's your aunt. That's fine, but just realize what you are actually getting versus what you envision.

So what is your budget for all of this? (Buying the car that is.)

Consider new belts, seat will old so seat back brace necessary, window net, and so forth. Can the car get a current log book as-is? If not, that needs to be considered.