Cheapest way to legally send money to Nepal from abroad is by using transferwise limit of up to $5k per transfer. It is a remmitance agency same as western union and moneygram etc with far cheaper fees than western union money grams compare and check yourself at their websites. You receive high exchange rate with very low service fee using transferwise. Click my referral link at https://transferwise.com/a/stephenr336 and get your first transfer for free.