Rental refinancing is a rare occurrence as rates are typically high. Now is a actually an extraordinary time to buy if possible... as interest rates for buying are near all time lows which can actually make the monthly cost of owning less expensive than renting. Especially here in the Austin, TX & Buda, TX area.
Nope they are higher due to more risk. Borrowers are more apt to make the payments on the home they live in when money is tight and thus let the others fall by the wayside and get a little behind, thus the investor wants to be paid for that risk.