They will let you in once. They will almost certainly let you in twice. They will likely refuse you the third time. Visa Exempt is for tourists, holidaymakers. People coming to visit occasionally. If you can make two holiday trips a year, you lucky so and so, fill your boots. If you fit that pattern then no-one is bothered. It is very simple, if you wish to come and go as you describe, multiple visits throughout the year, You need to get a visa. If you are as experienced at living here as you describe, surely you understand that?
