Yes I saw your pictures and took snapshots if I need to use. What oxy % were you at?

I'm thinking about whether providing you with the spreadsheet for the portables would be helpful. The information is two years old.
It has 41 (!) listings because I included 1st manufacturer, then model, then supplier prices. Other columns included supplier sale prices at the time, how many maximum LPM, additional battery prices for doubles adding in sale prices, weight, warranties, operating time with battery.
Within the 41 listings were, I think, about 16 manufacturer/models broken down with the above. There were an additional 10 models I chose not to research. I have no idea why. I probably had a good reason.
I'm certain there are new models and some which have been discontinued. Manufacturers are intent on lowering the weight of the portables and I think that raises the price. They are also trying to raise the top LPM. Anyway, prices can no longer be accurate.
If you don't need a portable, don't get a portable. They are about 3 times the price of a stationary and as I mentioned previously, stationary models can travel. Mine weighs about 30 pounds and rolls and the only difficulty anyone has with moving it is lifting it into a car or taking it up/down stairs.