Hold down the side button and either volume button for two seconds until the "Slide to power off" screen appears, then tap cancel to lock it*. Alternatively, press the side/power button 5 times rapidly to activate Emergency SOS and lock the phone.
Imo it’s hosting stuff for yourself or your family. In cloud or closet. If you have an advanced nas and you set up shares so everyone in the house can use it, it’s self-hosted storage. If you set up an iCloud account its not. If you rent vps, manage firewalls and reverse proxies and host your stuff there it’s selfhosting. If you use digital ocean or aws and do it for yourself its selfhosting. Saas isnt self hosting
It’s not about licensing costs at least. Cheap laptops with office and other bloat, and windows home is probably under usd10 per laptop.
But hardware requirements are a huge difference and with the ram shortage…