My Time at Sandrock

Each ingame day you can give each person a gift, which means you could make good progress in a single day and with the option to go to bed anytime to reset the limit, the achievement itself is not really hard. You could gift away some useless junk to simply make progress and risk some negative response, but if you care about your relation, my suggestion is to play the game until you unlock the moisture farm, here you can buy Jute, something that nearly all people like and give 4+ and later 2+ relation, because the value goes down if pick the same item over and over.

You could also plant some Jute Cantaloupe Seeds after unlocking the gardening option for your workshop if you want to save some money and also gift the melons away. I had around 400 units after a short time and Jute is often needed for a couple of comissions later on, so it's worth to collect some more anyway. I guess any fruits/vegetable should work.

Seasonal Events / Campfire meetups / Church at sunday or every other situation in which you see a large group of people are the best moments to talk to each one and gift away some Jute, or So instead of running around and searching for specific people, simply wait for events like that to make your life easier. There is also a skill that raise the outcome for relation or show friends on your map, but you should be fine without these skills.

Feel free to leave a comment if something is unclear or if you find other useful gifts. To be honest i didn't study the love/hate table for each char and simply shared my good enough result after testing around.