The object of that exercise is to minimize change orders ($$$) and to be sure that all three contractors are bidding on the same specs.

And it sounds like the bank often won't even exercise their due-on-sale option. 

Just like a bank loan they are responsible for all maintenance and repairs (because they are buying, not renting)Lease Terms: Purchase price when they exercise the option: $150,000.Monthly payment: $1,250.Non refundable down payment: $10,000.

Can the lender exercise the "due on sale" clause yes....is it worth the risk...only you can answer that.

@fred moskowitz suggestion I also downloaded an HP12C app to my phone as I understand it'll be needed to practice some of the financial exercises.

I'm hoping that you have a financing contingency and that the deadline to exercise it hasn't passed - but even if it has, you still cannot go through with the sale.  3.

We had to exercise each of our extensions that were allowed in our contract (PHEW).

Exercise caution when looking at the financial statements and be prepared to challenge and verify every single line item.

Even though I canceled the contract on the unit I was looking to purchase, it was a great exercise in hunting down appropriate funding.

I'd probably also exercise a bit more caution than just "going all-in with all chips on the table."