Not lenghty but more hoops to jump through. Photos. visit to you home by immigration, drae your house map, more paperwork, wife must go to immigration when you apply. May more questions from immigration. If you have the funds then entension of stay based on Retirement (you have an extension rather than a retirement visa) is much, much easier.
Many years ago (maybe 6) I entered the coun rty on a retirement visa from Brisbane, Australia. In January of this year, I applied for my first extention of stay based on Retirement. There was no mention of insurance.