My SIL had organised a meal for her 30th birthday in a posh restaurant with us, them, and 5 other couples. Her MIL (not my mum) has ruined all the plans calling her self indulgent and grabby for asking her friends to come for a meal and pay for themselves. This is fairly normal in all our friendship groups but has upset her so much she has cancelled it all.
I’ve now said I will throw her a garden party instead but the guest list has crept up to 30 adults and 5 kids (not her inviting more - just family all wanting to come too)
How can I feed them all, without costing myself a fortune and it still having the classy birthday meal vibe she was going for?