@Adrian Hollifield, What @Odie Ayaga said. You don't need to finish everything in the house in order to get reimbursed. Assuming a 3 draw schedule scenario, have your contractor break his bid into 3 parts. When he completes each part, the funds are released.
When I'm lending here in Wisconsin, I don't put a traditional draw schedule in place for my borrowers. My schedule is more dollar driven. I ask that they not ask for less than $3,000 at a time. However, to be clear, just because you bought the water heater, doesn't mean you're going to get reimbursed for it right away. It has to be installed (completed) to be paid. If a lender is going to fund something for 123 main street, the funds and work needs to be for 123 main street.
The reason that lenders look for completed work is because all too often things like water heaters, furnaces, AC units, appliances, etc, are bought and brought on site only to disappear to another project later. If they are installed, they are more difficult to move. Lenders don't appreciate borrowers who rob funds from one project to pay for another unrelated project. Robbing Peter to pay Paul will always end up getting you blacklisted by the lender.
Good luck!