I have shares in 3 aircraft and do the annuals on them every year. One is old, one is not as old and one is relatively new. They are all not flown over 100 hours a year. I do all the standard base things, lubes, ad’s, inspection etc on all of them. Then I go to where I know I have not been for a while to make sure nothing is wrong or can be made better. After a few years your aircraft are in good condition and you have confidence in them. Doing minimal annual inspection will lead to degradation of the aircraft and you will have to play catch up which will be expensive or worse.