Let's not put the brother through a guilt trip, he has money and wants to go on a family holiday, how do we know he could have given loads of money to charities that helps Palestinians? Afghans? Syrians? and other Muslim charities that helps out the Ummah? Masha-Allah Brother Red Curry Allah has blessed you with wealth. My simple advice (if your not already acting upon it) is give Sadaqah here and there, seek the pleasure of Allah with what you got, and Allah will increase your wealth, put Barakah in it and give you a high Maqam in Jannah.