Teamviewer and Skype works well. It's like "being there" - from anywhere. Love to meet you in New Zealand (on one of many trout streams), if you could get me there (currently in BC, Canada - sucking in smoke from all the wildfires burning).
You are right - Android (B4A) offers easy development for mobile. However, B4X (A,J,R,i) share all the same VB6 coding style. You can easily build web server apps to connect your B4A apps... VB6 desktop (or client / server) to hosted web (browser) is not a big stretch - just different - and these days - a WHOLE lot easier (with tools, libs and frameworks from B4X and community).
Hope this inspires you, cause you are already looking in the right place.
PM me with some brief examples of what you intend.