There is a good deal of variation in the mortgage market, not only from week to week, but from lender to lender. Many newspapers list current mortgage rates for your local area in their Real Estate sections. They vary greatly from program to program. Consult your Agent or your local housing authority for more information. The amount of closing costs will depend on what items are customary for buyers and sellers to pay for in your area.
Traditions vary greatly from one area of the country to another.
In some areas, for example, the buyer pays for title insurance. In other areas, it is the responsibility of the seller. In still other areas, the cost is split between buyer and seller. Your Agent can give you specific information on the items that are customarily paid for by buyers in your area. In addition, the amount of closing costs will depend on the amount of points you will be paying with your mortgage loan, since these are generally paid for up-front.