LOL... You guys crack me up...manual or not...lol. I've owned mine since 1986. The conv. top will need replacing every 5-10 years, hoses every 12-15 years, motor and cylinders hardly ever. If you like it manual, keep it that way. If you like it automatic, fix it and keep it working.
Don't forget a paint job every 10-15 years. Yeah it adds up but so does boat expenses or other recreation. Spend the money if you have it and don't if not. The main thing is to enjoy and drive your car.