For buy it for life, a corded oster, a safety razor, and straight razor are your best bet.

The only true bifl is a straight razor, but they require the most time, effort and upkeep.

Oster corded will probably do you 20 years np, just oil the blade.

Safety razor, a 100 pack of razor blades is pretty cheap: comparable to the price of half a months supply of triple blade cartridges. The handle will last you for life, and will probably cost you 60 bucks so you make your money back in the first year.

For true zero stubble, youll need at minimum a hot steamed face, and about three passes with a safety razor. Youll need to experiment with blade brands to find out what works best for you.

Straight razor make sure you strop well or you wont get it clean.