Well (I believe) I am on the verge of re-entering the collecting arena. But besides, I always felt bad about starting to help out here when you were new, but I was getting out of the collecting business. I've realised that I can't just leave the TF community because of the amount of time and effort I spent within it. And besides, I will try to help people I've known (internet or otherwise) if I can, that's just the kind of person I am.
Anyways, about serving a different version of a website. I haven't actually done any testing yet regarding load times... Reminds me of the olden days of web-design actually... But it is possible to hide or change entire sections of the normally displayed webpage to better suit display on a phone web browser. Of course, your demand is a lot different than my own personal demand, so an app may be worthwhile. With everyone seeming to do apps nowadays, there may even be an easy template out there to start with. Just make sure you don't get involved with something you can't handle. Heck I should talk haha.
Anyways, I will make an attempt to support you once again.