I still don't see how 10 percent isn't the usual standard of giving in both OT and NT. Of course not legalistically giving.. but by a desire to give to God.
10% was
never the standard for giving in either testament. Under the Sinai covenant, tithing was not "giving"; it was mandatory surrender of agricultural goods by agricultural producers (not by everyone), and under the new covenant, there is no percentage either required or suggested... anywhere.
If a person is giving out of a desire to give, they aren't "tithing", because "tithing" involves a specific percentage. Further, if they think they're doing something righteous by giving 10% of your income, they've lost the plot.
Small churches can struggle financially. I know from experience. One I was with got by from having sponsorship from other churches. That isn't ideal, because the church is kind of dependent on the other churches for support, but I guess when a church is small in number, this is very helpful.
There's nothing wrong with a more-established congregation financially "carrying" a small church plant for a while until it is self-sustaining. Imposing an unbiblical requirement on members is not the right way to finance a ministry. Even
suggesting that people give 10% is unbiblical.
And yes, I meant "unbiblical" because tithing of money, whether mandatory or voluntary, is not a biblical thing.