$2.40 is considerably over anything I've valued TGA at. The valuation arrived at by Donnelly Wealth Management is a good example of the weakness of using a P/E ratio alone to reach a realistic near term valuation.
The Donnelly report did not attempt to derive a near-term valuation. The report does not say so, but target valuations are typically 12 month targets. Also, in the paragraph where the multiple of 12 is mentioned, the report refers to investors, not speculators.
If you are an investor, and a PER of 12 seems toppy, then use a lower one, or some other FA methodology. All FA valuation methodologies rely on the concept of a required rate of return (RRR), and all long-term investors use them, sometimes without even knowing that there is an RRR lurking behind the rules of thumb multipliers that they use. The higher the multiplier, the lower the RRR.
If you want to second-guess a near-term price, then TA is the way to go, or some other empathetic way of guessing what Mr Market is going to do in the immediate future.
We have done this FA vs TA topic to death. If you have an immediate craving for avocados, you mosey to the shop and buy them, but if you want to invest in avocados, you plant avocado trees, and wait a few years. Both approaches to obtaining avocados are valid, and nobody bothers to debate the Buy Avocados vs Grow Avocados topic.