DVC has a minimum purchase of 150 points. The base price is $95 per point. If you take the Developer's Points, you pay $95. If you take the $10 off per point, you only pay $85 per point, taking your initial cost down to $12,750.
DVC will finance the purchase themselves if you wish. You need to put at least 10% down, and they can finance for up to 10 years. The lowest interest rate you can get on a 10-year loan is 9.75% at last report.
If you have the resources, you can probably obtain a home equity line to finance yourself for about half of that interest rate.
Once that initial investment is paid off, your only recurring charge are your Annual Dues (aka Maintenance Fees). Right now that runs $3.80 per point at SSR. You can pay that in one lump sum every January, or you can schedule it as a direct debit where 1/12 of the fees are deducted from your bank account each month. The monthly payments are kinda nice because they don't charge anything extra for this service. It's kinda like having an interest-free loan.
There are no resort taxes or other fees due a check-out. In fact, unless you charge food or souvenirs to your room during your stay, you will have NO BILL at checkout.
Another nice feature is that some of the fees are tax deductible. A portion of your annual dues go toward property taxes on the resort. Those dollars are typically deductible on your federal taxes. And if you finance the purchase through DVC, the interest paid is usually tax deductible.