The average floor (section) weighted around 10,000lbs or less and the list goes onBut whence getting into it here's what we finally had to do:That's not to mention the caustic and carcinogenic materials and chemicals i.e. formaldehyde and asbestos used in the particle board sub flooring, countertops, insulation and ceiling materials, etc.

If mold is on the joist that would be no problem to clean, just needs some equipment and on the sub floor i believe pending on how severe it is you may just get away with a cleaning with specialized chemical thats stronger than bleach (I know the name but cant remember how its spelled) , as well as a negative air machine, some duct tape, plastic sheething, tyvek suits, gloves and other ppe needed for the workers or it could be severe enough that the floors would have to come up (I know you dont like the sounds of that) and possibly trace it up the walls if any moisture wicked its way up sheetrock and the insulation thats in the walls?...

There are special primers for the walls to encase the cat (or dog) smell from this--which is an option.With a floor like this, with about a million high heel divots from 1890 until yesterday, and a finish that has reached the end of its service life, the discoloration is not such a problem, if you intend to put in pet resistant carpet and padding, it will be covered.An alternative would be to sand it down and refinish it to look like a refinished floor...they never look like new because they use chemical clear coats now vs Varnish or shellac like the olden days.Even with sanding the dog stains may need to be bleached out, and may still have trace shadow that they were there.Why is it a computer nook, well it doesn't have to be.

I feel your pain.I’m a female and new to REI as a business.However, I’ve always handled contractors for my primary residence, and I’ve worked in several industries - industrial chemical sales, bartending/waitressing, and I’m now I am a chemist with a PhD.All that to tell you that male chauvinism is rampant anywhere you go.

Try some of these threads:http://www.biggerpockets.com/forums/84/topics/45246-mold-questionhttp://www.biggerpockets.com/forums/88/topics/41433-mold-http://www.biggerpockets.com/forums/67/topics/31237-mold-and-rehabbing-simple-or-complex-http://www.biggerpockets.com/forums/103/topics/28752-short-sale-house-has-mold-would-you-use-to-offer-low-If you insist on a DIY effort, then get the proper chemicals; believe it or not, the local big box hardware stores have a number of these in stock, and by reading the labels you can figure out which one might be the best fir for your situation.

The new finish will wear off, especially if they use a harsh chemical cleaner.

If a parcel was owned by a company that manufactured anything, especially metal things or used chemicals, you can bet there is some level of contamination. 

Also decide how to handle proper upkeep of the pool as tenants prob. are not going to keep up on the cleaning and chemicals as well as you would.

@Ishan Puri  Get pre-approved with a lender first.....I'm in the Bay Area but I used Shawn Huss at Chemical Bank to get pre-approved for what I bought in Cleveland.....you can google him . ou can also look up @chrismason    He's here in the Bay Area ....Generally speaking, nobody will take you serious until they know you are pre-approved. 

Prefinished flooring offers advantages over onsite finished flooring, such as the ability to walk on the floors soon after installation and the absence of sanding and harsh chemicals in the home.