It would. I'm with benzyme in this as money as well as time is the main problems.

If I were to put it down in a research grant or something I'd give it no less than 1 year's of full-time lab time to accomplish. Do not be fooled into thinking it'll take less just because it may feel "straightforward" or "intuitive". 

Just as we speak, a supposedly "simple and straightforward" series of genetics experiments at my work has turned into a year-long nightmare...:? Never underestimate

I'm all however into entertaining ideas (yes, with gory details) of how things could be done, given that one has a lab bench, time and money. Any crazy mol biol takers? As already discussed, there are issues with regard to which tryptophan decarboxylase (easy to pich one) and which INMT (harder to pick one) to use.