Gordon. I agree. I'm not a needle guy myself. However, If his main goals tube secure in every vehicle he has with his keys secure. No water damage, no compromise and virtually no additional vehicle modification. This is the way to go. Most of the time its a piggyback plug you put into the OBD2 port for all the power and rx x tx stuff.
This is the website where most of the stuff is sold with a forum supporting the products. IF a person had a key card/fob/ etc for work or their residence, you could clone that - then program the chip with the same info. Then link that chip to the vehicle and now you just took care of 2 accessories in one small package.
https://dangerousthings.comhttps://forum.dangerousthings.comIF I was going to get one of these, it would be the Dual frequency chip. That way I'm covered for multiple technologies.
https://dangerousthings.com/product/next/Again,I agree.It is not for everyone. Might suit this persons needs and wants though.