150 US gallons = 567... l
Going through the math you would be using a bit above 28tsp (like 1/2 a cup) for that size res with your 1 part. That is also without calculating the ppm that it would be running at.. so it could be considerably more than this or somewhat less. The cheapest I could think of is Jacks. That would be the most cost effective way but that is still a lot of nutrients to go through. I am partial to 2 parts because of the micro nutes provided and the ability to provide more readily available nutes without salts/other insoluables falling out.
IMO, you aren't almost better going another way (aero, nft, ebb n flo, whatever), you definitely are at least in ease of maintenance and the continuous cost. The only drawback I could see is initial cost but that would likely be overcome through the 150gal res changes through your first run.