Friend and her obscure hobbies

[hannahj2]

I've been best friends with her (let's call her Mary) since high school.
Her hobbies and interests have always been a bit unusual and quirky to say the least. Nothing wrong with that..
However.. they are all very expensive hobbies. She doesn't work and lives at home with parents. In her late 30s. No kids or expenses.
I'm a single mum of 2, and live on a budget.
Mary has asked me to go along with her for a hiking trip to the lake district next month. It will involve an overight stay in a very overpriced hotel, as well as meals, petrol and so on.
I've no idea how she even manages to afford this kind of stuff... Hasn't worked for about 15 years. Not on benefits either. I work full time (luckily my sister helps with childcare and school runs) as lives next door. But despite working full time, I don't have spare cash and on the rare occasions I do, then I prefer saving it towards a family holiday.
I'm not interested in hiking.. nothing against the place in the Lake District.. it's pretty but I'm not in a position to fork out hundreds for a night there.
Also, wanted me to join a German language course with her starting in September. Again, it's all money. Besides, with my job and kids I don't have time to be attending courses.
Another one was a concert she wanted me to attend. Some obscure 90s duo I'd never even heard of till she mentioned them. Not remotely interesting to me.
How do I make my friend see all this? She's a nice person but just doesn't really seem to 'get' my need to work.

I'm only here on the off chance the OP comes back.

I'm also disappointed by the non obscure nature of the friends hiking, language learning, going to gigs hobbies and am curious as to what the OP considers 'mainstream' hobbies to be.

Oh.

I was assuming this was one of those AIBUs based on a book or a film plot or the nativity story, and was trying to work out what it was.

(I do know someone who does roadkill taxidermy though. Two different people, in fact.)

I agree, but this is her BEST friend. One Frank conversation would do it and if it isn't enough, then she probably needs to reconsider the friendship anyway. But you know that people only see what we let them.

If she indicates to the friend she's OK money wise, that the holiday wasn't a huge stretch, that her sister loves having the kids etc then £100 for a concert isn't such a massive question.

If she moans about how she'd love a break from the kids then suggesting a weekend away isn't such a crazy idea.

But I wonder if OP ever makes the effort back or if its all on the friend