Well...the faith I was raised in has some very good attitudes towards "doing things on the cheap", using all-volunteer ministers, lowering printing costs, not even passing a plate around, just making a once-a-month financial statement of less than two minutes telling how much is in the congregation bank account, what the bills were, how much is there positive/negative. If it's low there'll be a few extra bucks in the contribution box in the back - which is purely anonymous unless somebody drops a check in and money from each parishioner isn't tracked. They even figured out a special ink that would print on cigarette paper (the cheapest they could score) so they could sell bibles and whatnot at really low prices ($2 a pop for bibles last I heard, which was 1980s...)
In 3rd world countries or similar they're willing to do without church buildings, just meet...basically anywhere handy.
They experimented with radio evangelism in the 1920s-30s era but realized it was costing too much, forcing money-begging which they otherwise didn't do (and haven't since).
I'm not one now because...I don't think they've got the WHOLE truth like they think they do...but there's a lot to admire about them. The Jehovah's Witnesses. (And a lot *annoying* of course
...like, say, the belief that God will take back control over the world once they've knocked on every single door...hence they *track* that I kid you not...)
What else...one of the three weekly meetings breaks the congregation up into pieces and uses people's homes. That's "plan b" in case they lose the main congregation building or if there's persecution...yeah, they literally have plans on how to go underground, even in the US. Given they were flat-out banned in the US during WW2 (and it was a LOT worse in Germany, the USSR, etc.) it's not completely irrational.
Funny story: there's only one "ornately massively overdecorated" JW church building...and they got it by accident. They bought an old theater back east somewhere, intending to turn it into one of the larger regional "assembly halls". It looked plain enough. Once the all-volunteer crew started digging though, they realized they'd stumbled on an old 1920s-era "movie palace" - the monster of a chandellier was in pieces in storage, ditto the original red velour seats in bad shape, there was an entire replacement ceiling covering up a big guilt dome, the doors were solid brass under about 20 layers of paint...it went on and on.
They did a bit of research, gathered the volunteers together, said "hey, it'd be more work to restore this place to original, we could also just do functional, let's take a vote". The vote (by the volunteers) was to do a restoration. They give tours during the week when not otherwise in use...it's the only JW building anywhere that could give parts of the Vatican a run for it's money
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