While it's good to know that you eventually need a Baptistery, large statues, a marble altar, stained glass windows (etc), those things are "when I win the lottery" pipe dreams for 100% of Resistance chapels, and probably will be for the next 10 years or so.
What I'm more interested in is the stuff you need to have a normal-looking Mass at your Resistance chapel.
It's easy to put cinder blocks under a regular wooden, full-size conference table and drape it with bedsheets, etc. so you can't see the ugly frame. With proper altar linens on top, and a painted wooden board propped up behind it (where you attach a good-sized crucifix), your makeshift altar can look quite nice!
But other things would really be helpful, even in the short term. For example, Father had to hand a corporal to the altar server to use for a paten at our Mass here. I wish I had known that their Mass kit didn't include a server paten.
I have no idea what kind of cruets they normally use, since I bought some before they got here. Did you know that 10 oz. is the perfect size? I got lucky. Nowhere does anyone talk about details like that. Also, on Amazon.com you need to buy them in packs of 6 for a total cost of $28.
They only had 1 serving of Mass wine left. How does one acquire Mass wine? Are there any regulations on what kind of grape wine is used? Can the wine have sulfites, or does it have to be sulfite-free? Is there a preferred brand?
They also don't have regular Mass candles. They used a couple small red votive candles on the altar -- it didn't look very normal. Brass candlesticks are pretty cheap, but what size/diameter are the candles, and what type do they have to be? I think it's 51% beeswax. But what diameter are they usually? What is a good source for them?
For Ashes, they needed a bowl, towel, cake of soap, and water to clean up afterwards. They used water from the water cruet, since it was large enough. I wish I had thought of some of these things beforehand.
They need a missal stand. Just a piece of wood that props the missal up -- it can't be very expensive. But we had to use a throw pillow since we didn't have one.
Stations of the Cross -- we printed out some black & white stations, and laminated each one with a nice lamination machine we have. We still need 14 small wooden crosses to be able to properly have Stations (with the indulgences and everything).
Recording equipment! I really messed this one up. If you don't have a friend with nice recording equipment (or just in case that friend doesn't show up for some reason), at least have a laptop, tablet, or phone handy to catch the audio. Use common sense -- place it next to the priest, or as close as possible, and try to minimize noise in the chapel during the sermon.