There is a deposit of $50 to hold your place. There is no additional cost to attend a retreat other than the non-refundable deposit. They do ask for an anonymous offering at the end of the retreat (suggestion is $260), though you are not obligated to pay. The retreat house is meant to bring peace, and they don't believe money should be a factor in encountering Christ.
$25-50 down deposit, total is 250, but if you can't afford that they'll accept however much you can afford
Thanks! Your answer is awaiting moderation.