From what I've seen, heard, experienced...
DVC is pretty open when it comes to credit history but they won't approve everyone.
DVC info does not go on your credit report so it will not add to any debt you may already have. We thought it did go on because we were never told otherwise and called our guide to cancel because we were buying a new car and refinancing our home and did not want our debt to income ratio to look weird because of a $14,000 dvc debt. They do put it on your credit report if you are deliquent.
There is nothing wrong with handling the transaction over the phone.
Only buy VB if that is what you truly want for your home resort. WE LOVE VB and wouldn't have done it any other way. We are in the minority and love to stay at VB more than WDW. Buy BCV if most of your stays will be in Orlando.
I've heard that BCV is selling fast and I have also heard that it won't sell out by June. I don't know which statement is true.
If you are worried, call a guide and talk with him/her. Maybe it won't make a difference if you join now or in June. Do you know for sure that your income will double in June?
Would you join now if they approved you? Just ask yourself these questions. If you wait 'till SSR starts selling the price will be higher per pt. than it is now.
They are also running a Magical Beginnings special now on VB and BCV, I think.
Do what feels right to you. If now isn't the right time you will know that in your heart.