Often the solution is replacing the metal or letting it run course but minimizing the rust exposure. 

When vetting your PMs, ask the questions that might provide solutions to these problems.Solution to #1 – you are looking for full transparency.

I''d appreciate any advice or suggestions for the most cost-effective solution for replacing a wooden framed window that's in a shower.

I think these sorts of solutions are going to help everyone.Good luck!

Solid Rock Structures (aka Solid Rock Construction) - Andy GibsonDesert Solutions - Matt Reitler

I'm going to take everybody's advise and combine it to come up with the solution.

There are smart lock (Rently) solutions out there that make showing a lot easier. 2.

My ideal financing solution would be for a hard money loan (~50% loan-to-value) with a required payback at either house sale or max 1 year.  

That being said, for clarification for anyone reading this, you are not required to notify the bank that title is transferring, it's perfectly legal when done the right way, if you do contact them they will call the loan due which they have a right to do but are not required to do, there are solutions if they do call the loan due.

Other solutions include "assuming the loan" formally, using Hard Money to refinance, working with the seller to make the bank happy, selling the property and several other solutions.