Despite what some landlords will tell you, it's simply not worth having a rental property, firstly, without a tenant paying of a significant part of the mortgage by increasing your equity in the property, and, secondly, the capital gains.Yields drop when house prices rise.
On a gross yield of 3.7% over 30 years, that is a pretty poor return. Much easier, less hassle and a better return to simply put your money in the bank over that 30 years rather than be a landlord. I guess the value has increased, any idea of current market value?
Don't want to say the value of the property online except to say it's pretty much the average for the area.