Hey man! my wife got visas in fourth attempt.You don't need to be worried.Nod need to show your property evaluation. You can show some money in Nepal so that she can expense that amount for ticket or stuff like that but don't show much.The main point is I-20 and the way you fill up the forms issued by consulate.These two things they take care very thoroughly.Damn care about your property in Nepal and your money deposited in your account these carry no significance as long as you have sufficient fund from the school.You can show bank statement from any US banks, couple of thousands don't need to show more amount!Take your original relationship paper with you and your family with photo issued by government of Nepal along with your translation.Marriage photo sometimes they ask sometimes they don't, it is not important but you can take for your satisfaction.If you need more help email me later.don't ask with too many people they will make you made and every person give you every new points which may  not have significance.
Thanks