it is feasible, however 3500 premises is heading up the edge of the efficiency bathtub curve as there are only so many channels available.
We have 5 networks and the largest has over 1500 on it and also covers a significant area.
Technology however is continually improving in the Wireless arena so fortunately for the 9+ years that network has been running, we have been able to replace/upgrade infrastructure to keep chasing the ever hungry demand for data.
It all heavily depends on how well the network is engineered, if it is designed and put in by a seasoned team of Radio engineers with plenty of experience and understanding of the many pitfalls to avoid, then it will fly.
If it is put in by a marketing outfit who buys black boxes and gets untrained monkeys to build out the network with it, then no chance.
If these properties are spread over a large area then a cellular type approach means frequencies/channels can be re-used over and over in a non overlapping way, efficiency and performance can be maintained .
It also depends on how the network is fed , each one of our networks has a single feed point, this makes it far more cost effective , all but one avoid last mile Fibre too, choosing instead to directly link to a Teir 1 Point of prescence for example.
Others i know of will put a leased line into a village and distribute it just for that village. this makes the radio side a lot easier but increases the backhaul costs immensely.
I am not sure how you cover your costs/margins for that method to be honest, unless you charge a lot or get given a huge handout.