working on more sites, starting from home in order to not share 50/50 with the studio, and other tips she can find in Models only area, including sites reviews and other models opinions.
Depends what you mean by "enough".
To survive, yes, might be enough, to feel good, for some yes, for others no.
Working in an adult field shouldnt mean only subsistence earnings, but higher, to justify the exposure. Either she gets naked on cam or not she can still be recorded, posted, risking the image for the future etc so if she doesnt earn enough and not doing because she likes to be a cam girl, she should up her sales in order to start a more profitable business for her.
What justifies the higher than normal salary, dont matter where you live, is that even the garbage caring employees have an "extra shame fee" so they actually earn higher than regular people (of course, not highest). So if u have a job as doctor or nurse for instance where you have a specific professional status even you don't earn much, as cam model it's not a job to add it on CV or to invest in future other than financially, so yes, the earnings have to be higher. Many models already had to choose between professional status and financial status - if you have none, it's not justified.
The first thing to do when a model who stepped into the cam work is to put everything in balance and play her cards smart.
So in case of your friend, if she can have another job earning 400 euros/month it's not worth remaining in cam work for extra 200 euros only, unless she really enjoys it. But when a model earns few good thousands and she is offered a job of 400/month, she wont even think about quit working on cam if she's in already.