Put your money into a quality universal RODI unit. The initial investment pays huge on the long run. I use a spectrapure 90gpd 4 stage, it’s very cheap to run and works very well. Find a used one even, filters are a few dollars and aren’t proprietary designs.
A brute trash can works great, I use one. Buy it new from Home Depot and rinse before using.
That’s it, hook it up to a water line and setup the unit and can somewhere out of the way and in a heated area of the home (mechanical room is good). Add a float to turn it off in the tub and an auto-shutoff kit plus a flushing valve.
If this is out of the budget, honestly consider waiting for the purchase and buy water in jugs for now from a local water store. Buying a cheap one now then buying a proper one later is more expensive than just waiting and doing it right. This hobby isn’t cheap, be sure to buy quality