Way to get around this? Easy.

Buy a large tank, they are surprisingly cheap (225 gallon tub, comes in a metal cage, or "tote"), then rig your house's plumbing like this:

Water in / Metered connection (however that's designed)

Orifice device

New plumbing (of any size) to your (probably unused) attic

In your attic is that tote I spoke of, or a 225 gallon "surge tank"

Also new plumbing, back to the rest of your house where the old connection was.

The reason you have to plumb it up to the attic is for utilizing gravity as your mode of force since that little pee hole won't give you sufficient pressure for shower/ toilet/ laundry, etc.

Since (and if that really is the diameter) the hole is so small, the piping (PEX recommended) going UP can be whatever size, however the piping coming down should be equivalent to the rest of the house's plumbing size. (Usually 3/4" or 1"). You take a shower, you have full pressure for 225 gallons + since new water is also coming in + you hot water tank volume (unless you have tankless), either way, you have plenty of water. The pee hole size orifice plate will just fill up your tank over time.

Ensure you have enough structural support! Water is ~8 lbs per gallon, thus equal to almost 2,000 lbs. (Water + Tote)!!!