Streets and Trips Alternative for Mexico?

I started to sort of learn something new today. I had forgotten about the Garmin Base Camp but I decided to do my Garmin NUVI updates today and out of curiosity opened Base Camp to take another look at it. With the NUVI downloading updates the Base Camp can also update. So I checked the new roads and they are on both. Then I started just fooling around with Base Camp to see what can be done with it. You can plan and save routes and you can add waypoints and things like that. I do not know if it works as a GPS but you can plan your route in Base Camp and then put it on the NUVI. The advantage to me is that you work on your planning on a full size computer screen instead of a tiny little limited use screen. I don't think it is anywhere near as advanced as S&T as far as functions go but it can be a way to plan and save routes and do other useful things. I didn't spend much time with it so don't know a whole lot about it yet but I do hope to spend more time with it to see what else can be done with it. So as a new roads replacement for S&T this could be part of the answer - buy the 2757 for around $200 directly from Garmin and get free lifetime updates as well as Base Camp and then coordinate them and sync them and use the NUVI with the Base Camp planned route as your GPS as you go down the road. Seems to have street level mapping of every street we know of in North America. Probably take some practice.