Just to jump in here (where, no doubt, I am not wanted) I don't believe there is any "Tax Incentive" for donating to a charity, only a deduction from ones taxable income based on the value of the donation.
I make mention of this because: Several years ago I offered a lady in New Mexico $5000 for a "Fixer" RV she had for sale
. She made the decision to "Donate" it instead and tried to take a $12,000 deduction, a price one like hers, but in perfect condition, had sold for on eBay, thinking that she could save $12,000 in taxes.
As a result: 1) The IRS disallowed her deduction, because she didn't have a certified appraisal of the donation, and reduced it to $3500, which was current NADA book value and, 2) Even though she was in a higher tax bracket (about $25%) she only recovered about $875, rather than the $5000 I had offered.
In other words, if you donate a trailer appraised at $10,000, you can deduct that amount from your taxable income
, saving from whatever tax bracket you are in. For example, if you are in the 15% tax bracket (High for most retirees), you will get a tax reduction of $1,500. If you don't have $10,000 in taxable income you will have to carryover part and distribute the deduction over several years. If, like many many other retirees, you have "0" taxable income, there is no tax savings available.
But now, seeing that the OP already obtained a Casita in Post #3, I have no idea whatsoever where this thread is going.