I've been living with this clay issue for over a decade now and have gotten to the point that it is acceptable; there continues to be clay but maybe less than 5% of what we used to have. Just like homewater systems said, to do it right, you really do need a holding tank. My system cost me $3K about six years ago and is still only acceptable. I had so much clay I changed filters weekly, 5 microns...the Big Blue filters which were not cheap, and that only removed the chunks of clay, not the colloidal bits. My toilet tanks had a couple of inches of clay settled in the bottom and who knows how much is in my pipes. After testing the water, no bacteria, just the clay. By the way, the color of the clay is gray.
My filter tank back flushes three times a week and the medium needs to be replaced every 7 years or so at $600 per filter. I use pool coagulant, best bang for the buck, rather than the aluminum SOP. Because of my area, country with a lot of wells, our town has a place to get water for free, one gallon at a time, so I bought a water dispensing system that holds the 5 gallon tanks. I fill those up and use that water for drinking and cooking while the filter system takes care of the household water. That water is drinkable but we chose not to, more for psychological reasons rather than rationale reasons!
The other option is to simply pay for water to be shipped in but that's expensive mainly due to the price of fuel plus, initially, you'll have to buy a large holding tank and place in a basement or dug relative deeply in the ground. Or you could try digging another well for another $3K. In my opinion, the most cost effective way to have acceptable water is to purchase the filtration/back wash system with as large a holding tank as you can afford, around $3-4K and spend $20-$30 per month for the coagulant and bleach, and then decide if you want to purchase drinking water. Out of all the issues that can happen to well water, colloidal clay is probably the toughest to take care of and requires action on the part of the owner every couple of weeks to monitor the filtration system.
A word to the wise. If you ask someone to put in a system for you and they say it's "easy" to take care of or they don't know what colloidal clay is, don't let them touch your pipes. If they apologize, tell you it's expensive and say they can reduce the problem significantly, meaning they probably can't guarantee eliminating the problem, then they're being honest and it's probably worth going with them. I will say this, while my problem has not been eliminated, it was well worth the money because it is now a minor annoyance rather than a major headache.