You don't directly convert dosage across species like that. The dosage they tested on monkeys was 250mg/kg, and the human equivalent would be less than that.
I see that Amazon sells 1 gram capsules of taurine (several vendors). So, yeah, not too difficult to consume. One brand I saw is about $0.08/gram, so it wouldn't be overly financially burdensome, either.
In this case (1000mg * 3/37)) comes out to 81mg/kg. So, if you weigh 80kg, it comes out to 6.48 grams per day.
That's a lot of taurine, but not really a crazy amount. Easy enough to consume.