Not the person you asked the question to but in my case the answer is yes, except for my underwear. That goes in the washing machine at 30 C (86 F).
Workout clothes are plastic, some T-shirts are plastic too, some are cotton. Socks are cotton or wool. I put them in a bucket of cold water with a detergent made for that (sorry, I don't know the English word for that.) Liquid for wool and socks, powder for the other clothes. Five minutes are enough. Up to here is not worse that putting everything into a washing machine and you can do it in any house.
The tedious part is washing away the soap with cold water. That takes time. I hang the T-shirts and the large clothes and wash them with a hand shower. You need a place to do it without flooding the house. For small clothes and socks, the bathroom sink. Squeeze out water gently by compression, don't twist.
Then I hang them to dry. From here on is the same as with a washing machine. Once they stop dripping water you can put them anywhere. In winter you need either a window in the sun or a source of heat or it will take forever and they'll smell. Don't put them directly on a heater, that would destroy anything plastic quickly. Leave a span.
This is not something that can be done in every house but if you can then clothes will last much longer especially the workout plastic ones. Check the detergents for water temperature, colors, type of fabric, time etc.
Edit: make sure to let air flow somehow because that water in the clothes must get out of the house or you'll get mold especially in some climates.
How is this any different from a washing machines handwash/delicate program? It soaks in soap with no movement, cold temperatures, then rinse it gently with water.
I wish that's how mine did it, even on the hand wash/delicate setting, it still does 3 spin cycles (although I'd guess not as fast as the other modes). But more importantly, I hand wash so I can spot clean. Easiest way to spot deep stains etc is when the clothes are wet and you can hand inspect them. I'm so obsessive about this stuff i won't even accept any fade in the blacks, and no yellowing in my whites.
