I've been on home oxygen since contracting Covid pneumonia back in June which resulted in blood clots. I have a home oxygen generator with extra long tubing on nasal canula, and I also have portable oxygen tanks that I use when I need to leave the house for appointments (they last about 1.5-2 hours, depending on how much oxygen is needed). My insurance covered the majority - I have to pay a maintenance fee of $14/month. I call when the portable tanks are empty and they send a delivery truck out, usually within 24 hours, to bring me new tanks (I have 2). It keeps my O2 sats at 97% or higher. If I go without it and I'm not "resting", my sats will drop into the 80's. It is a pain to have to drag the plastic tubing around, but definitely helps me be able to get around without passing out.