The United States is a republic, not a democracy. I think you've confused feudalism with the concept of federalism. That is, where powers are divided between a representative central government and individual state and local goverments, compared to feudalism, where power is divided among property owning lords and giving fealty to a monarch.
Thankfully, we have moved on from a scheme where property rights were equivalent to voting rights. Today, basically anyone who is a citizen can vote.
The problem as I see it today is too little federalism. If the central government dictates so much of our day to day lives, you can't move to another city or another state to escape the tyranny.
Finally, political science aside, the difficulty with the actual mechanics of voting lies in the limited resources available to local election officials. These people are often city or county administrators or auditors, with other responsibilities beyond election time, and they are bound to competitively bid a "boxed" solution, rather than roll their own. I think this is definitely a situation of "build it, and they will come". It will take a critical mass of interested parties (like a trade group of local election officials) to certify and support a solution that could then be built by the private sector.