A friend is getting married next Easter, I'm delighted for her and glad she's found The One. However. When she emailed me last week to tell me she was getting married, she said 'I'm telling you now so you'll have plenty of time to save up so you can't use the excuse that you can't afford to come'.
I am unable to work due to ill health. DH works full time but is on a low wage. After all our bills are paid we're left with under £100 a week for food, clothes, etc. My friend knows this. The wedding will be hundreds of miles away so we would have to pay for hotels and travel (around £1000 for me, DH and DS altogether). Then there's clothes and whatever - I have nothing suitable to wear. My friend is very well off and is having a very fancy wedding with a dress code, so we'd all have to have new outfits. It's simply not doable. There is no spare money to save, we're on our uppers as it is. And if we could save a grand, we would be spending it on essential house stuff (parts of our house are actually falling to bits). There's no point me asking her if she'll help - she's saying she's 'stretched' with wedding costs already (which may or may not have been a way of letting me know not to bother asking). Maybe she'll do what she did at her wedding to her exH when she charged every guest £50, including children - that'd help un-'stretch' things 
AIBU to think she's being U? And that the wording of her email was a bit rude, too? It's not an 'excuse', it's just the way things are 