So that leaves only the problem of taxing people against their will to build them, except where you don't live and they have to take land and money away from citizens.
You still haven't demonstrated that land would need to be taken from anyone. And I'm actually advocating something that is more efficient in terms of traffic and use of tax dollars, and would require less taxes in the long run. So I'm comfortable with this. I've never said I expect to abolish taxes, at least, not any time in the foreseeable future. Why you're so uncomfortable with doing away with stop signs, I don't know.
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Your assumption that everything you advocate is best, and needs no proof, while any reason that I give to the contrary should be assumed to be illogical and must be proved otherwise.
Most stop signs are used where two, two lane streets intersect. I find it a logical manner to avoid accidents. You are the one who wants to do away with all stop signs and traffic lights.
As usual, this is yet another discussion that goes nowhere, because you assume that you are always right in every case, and if I propose that your "solution" is not practical (doing away with all stop signs), then you make it my proposal and claim that it was not your proposal, or you ask for proof about something hypothetical, such as the cost of building a roundabout in a hypothetical location, which is impossible.