We provided all articles of incorporation and an unanimous consent from board of directors stating that the company was authorized to purchase the property and procure funds for purchase from my partner. 

Any financing with a personal guarantee is unique to that party and consent by the lender will be needed for a buyer to assume the loan.

If the lease requires the owners consent it would appear you have no grounds.

Im not against options, just be careful, the reality is very few people exercise their option, like 2-5% (they just cant clean up their credit and save) and tend to forfeit their option money, even though you have a contract, do this a few times, and you will build a reputation, and not a good one even though what you are doing is legal, and everyone consented you will still be considered the bad guy for taking their option money.

(BTW, you can't wholesale a financed sale or Sub-2 without the seller's specific consent accepting the real buyer.)  ?

I think that fee goes up for further offenses and eventual revocation of your account.If you are trying to scale up, have you thought of starting a real estate agent team with you as the team lead and having a licensed agent do this work for you in exchange giving them a few leads?

Our privacy laws are such that any one selling such a list would have to obtain the consent from those on the list .. which just is not going to happen at a high enough rate to make a business.You either need to build your own lists by canvassing a neighbourhood; watching the papers / Royal Gazette for mortgage sales / foreclosure sales / tax sales; or Spamming an entire neighbourhood (Canada Post provides such a service).

It is very likely that the seller listed it without full consent of siblings.

✓Requirements for a Delayed Financing ExceptionThe original purchase transaction was an arms-length transaction.For this refinance transaction, the borrower(s) must meet Fannie Mae’s borrower eligibility requirements as described in B2-2-01, General Borrower Eligibility RequirementsThe borrower(s) may have initially purchased the property as one of the following:a natural person;an eligible inter vivos revocable trust, when the borrower is both the individual establishing the trust and the beneficiary of the trust;an eligible land trust when the borrower is the beneficiary of the land trust; oran LLC or partnership in which the borrower(s) have an individual or joint ownership of 100%.The original purchase transaction is documented by a settlement statement, which confirms that no mortgage financing was used to obtain the subject property.

After a notice of default/demand is mailed out, the seller will not be able to contract on the property without consent of that lender, it is a notice of legal action and your contract can be squashed.