Of course, my upcoming pension and social security when I get older are nice little annuities to have as backups.

For this I used the Future Value of a Growing Annuity Formula.

They take 25% of our money and put it in annuities that earn 3% while they invested god knows what during the bull market of our money. 

Unintended REI Annuities !!! 

The value to the buyer can add up to a very sizeable amount of money; typically pays the up-front lender fee to lower the interest rate, which results in accumulating paid interest savings for the buyer as long as the buyer owns the property, or for the life of the loan; may add up to many tens of thousands of dollars; make sure you check the fine print of the lender's loan lock provisions; be sure your seller's money is truly paying down the loan rate as opposed to paying other lender charges to the buyer.  3.Seller-Funded Temporary BuydownsBuydowns can also be structured to adjust the buyer-paid interest rate for a limited number of years; can cover the first two, three or four years or more of the buyer's loan; allows your seller to reduce the buyer's ongoing loan cost (monthly payment) considerably.4.Owner FinancingA willing seller may be able to keep their selling price intact by offering financing to a buyer; for a seller who needs to sell as soon as possible for the best possible price; expands the potential market for buyers to those who might not qualify with a lender for any number of reasons relating to their credit, verifiable income, or other issues; seller creates an 'investment" that can produce an annuity with a very good rate of return for many years; seller needs to become very well educated on how to qualify a potential buyer (how to get credit, income, debt ratio, and other accurate personal historical data on the buyer-and how to verify that data); seller needs legal advice to review contract documents, as well as title and escrow services to conduct a title search and closing; buyers attracted to seller financing may have income sources including part- time work, bonus income, royalty income, dividend and interest income from investments, or they may be newly self employed; seller who finances needs to get a substantial down payment and ensure that the property is adequately insured by the buyer and that initial property taxes are pre-paid and a tax payment plan is established; if the buyer stops paying, the seller will have to proceed like a bank or other lender and foreclose on the buyer. 5.Contract for DeedA contract for deed agreement to purchase is similar to a seller-financed purchase.

Annuities are not insured and if the company goes bust, you lose all your money.

I have a new job that gives me a pension and annuity plan so I feel very comfortable using this money to buy homes

I'm partial to annuity-based calculations that factor in the investment horizon and individual risk preferences of the retiree, like this one.

Does anyone have experience using funds from an annuity fund to use as hard money down payment on purchases?

We don't count pensions, annuities, investment income, interest, veterans, or other government or military retirement benefits.