For a serious "filter" system, you would want several stages with a manifold between each stage for specific applications. Starting with a fine strainer, as near the well as possible. There is a sorta one at the foot valve that protects the pump. You want a finer one on the ground for utility use. Even a stainless or ceramic valve will wear from particulates, you want to stop as much as possible.
Brass or bronze plumbing fittings have a limited lifespan since lead has been removed from the alloy. Any fittings should be acquired in multiples, the way I think. With a couple of fittings allowing maintenance, the average life span on city water is less than 20 years these days. Well water will be far shorter.
A small well house at the well head would pay future dividends. Not alone to protect from freezing, which you say never happens. Never say never, say exceedingly rare, but never never. My brother has photos (somewhere) of a fairly heavy snowfall on I-75 south of Tampa, Fla. Sunlight will degrade plastic seals as well as metal pipe. Weeds are controllable, but the more so inside a small well house. The only real problem is with critters. Ants and snakes mostly, although other critters will find the water eventually. Wife uses "diatomaceous earth" for every thing from ants to large bugs. It is "enviromentally friendly", but that's just the way we approach things. The dogs take care of snakes and other things larger. The diat. earth is safe to use around the dogs. . .
Varying filters can keep smaller and smaller particles clear of the system. You don't need purified water to wash the car or flush the toilet. But it is appreciated in the fitchen. Your call as to what to use where. I run the house on "city water", have a roof catchment, and a well as backup. Although I do have a strainer and filters on the city water. What they claim and what they deliver are only in the same book. They are kept seperate to pacify the health department, but have taps where things can be cross connected if ever necessary. The dogs and goldfish(?) won't touch city water. I guess the chlorine smell puts them off. Plants seem to like the roof water, as well. The well is mostly for cooling, sort of a home made heat pump. . . The well is probably illegal these days, but I dug it out and keep it quiet. It was active in years past, before the property became part of a city.
I can't give "advice" on your system. Merely touch on what I have and what works for me. The only advice I can offer is to plan for what would be the ultimate system and then plug in the parts that are needed as they are needed. With pipe and/or blank fittings left in between for use as needed. I happen to be partial to threaded iron pipe, copper would be better for most applications but iron pipe can be free standing. Plastic pipe also serves its' purpose as well, but must be better protected.
Edit: Corrected highway number
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