Well, if you bring a Talon bot for example, You'd have to adjust his build accordingly. If you start with the same item you would normally, you would fall behind due to lack of gold income (If you aren't taking the ad's cs). You also can't count on your ADC to be bad either, there are a few with some decent mechanics at least, and you'd be putting them behind taking their kills and cs, if that is what you intend to do. Your team would also lack a lot of utility and vision unless you buy a sightstone, so already, if you build proper support (like what your team needs), you'd be behind in damaging items and not have much of an impact, which would change your playstyle opposed to taking "x" champion mid.
Not to mention, while trying to lane mid is hard to learn, it is still something you have to learn and master if you actually want to master a champion. It may be hard, but it is so many times better than taking a short cut and trying to cheese your way out of bronze/ silver, only to have you try to take mid and failing because you don't know how to solo lane. You might be good at a champion's skills and combo's, but you won't know their match ups mid, or their power spikes, etc. I don't think this is a really good idea, you'd be better off playing the champion in the lane they are meant to be rather than support, or you should learn how to support or ADC if you want to do things bot. It would have a better impact for the team, and eventually help you climb better.
Cor, if you want to have fun in normals, I'm sure everyone is guilty of that, but to do this to climb elo, it would not help.
mid?
SUPPORT
