There is something strange here. My understanding is that the deposits paid the purchase of new condominiums are paid to the developer's lawyer 'In Trust', and must be deposited into the lawyer's trust account maintained for handling of client funds - separate from lawyer's own business operating account. The lawyer should not be in a position to 'lend' the funds back to the developer. If the lawyer withdrew funds from the trust account and forwarded them back to the developer, there would be a huge liability on the lawyer, and the Ontario Law Society would be all over it. Ultimately, if this did happen, and the funds were unrecoverable, I would believe the Law Society's professional liability insurance fund would be called on to make up any shortfalls.
If the financial institution which held the trust account went and loaned the funds back to the developer, and the funds were non-recoverable, the loan to the developer would be a liability of the financial institution - an FI cannot lend funds, fund a loan from a specific deposit account. The only case where this can happen is when a homeowner arranges hold their mortgage in their RRSP - a very restricted situation. So if the FI holding the lawyer's in trust deposit account did turn around and lend funds to the developer, it is the FI's problem - they would still be responsible to pay out the funds in the trust account when they are legitimately withdrawn, either to close the purchase, or refund the deposits back to the purchaser if the project is cancelled.
Of course this does not apply to the amounts paid for upgrades - in that case, I believe the purchaser would become one of the many unsecured creditors of Vandyk, with any ultimate payout depending on the proceeds of the ultimate liquidation of Vandyk's assets, and how much is left over for the unsecured creditors.
It certainly appears, to me at least, that the receiver may have, in this case, taken on a situation outside of their normal experience.