At least, you will probably be required to seal around the pipe fairly well.If you have to put a door in the fire-rated wall, it needs to be a fire-rated door - usually either solid wood or metal.  

I have a fairly limited knowledge of loans and how to secure them so any information would be invaluable. 

As I'm sure you know, inventory is low and prices are high in Seattle and my company has access to a fair amount of pre-market listings!

@George TorresIf you're trying to turn the the flipping of in real estate into your full-time job or one of your main jobs, then look into the ROBS 401k (Rollover as Business Startup) as it will allow you to use all of your retirement funds tax and penalty free to finance a real estate operating company provide a you are an employee of the business and therefore you can draw a fair salary. 

New doors are better than what I started with, so is that fair?

I am fairly new to this group as well, and also in the N.

They contain a fair amount of deferred maintenance, and these properties are poised for cash flow.

Then figure out how much of a "kicker" you want to add to the fair market value of your property to make it a worthwhile transaction for both of you.  

I am considering not giving ANY references but this may not be fair to a good tenant.

Charles, is fairly safe.