That’s a fairly excessive amount of pets if you ask me! 

@Matt Faircloth In addition to not meeting most building code, you will be introducing a ton of moisture inside the unit. 

Hey everyone, looking for advice.We have owned a condo (3/2) for 10+ years and the market is now favorable for selling.We have had two full price offers both of which terminated during due diligence due to subtle structural damage, moisture, and rusting on the old cast iron pipes under the common building.  

Your electrics will be a mess and the house will mold from the moisture from the plant transpiration.  

The in-place rents for the cash outlay are pretty low, but that's all relative...the repairs seem excessive...assuming an ARV of $650k and cash out at 70% LTV lands all of your cash back in hand if you do not do the reno...use delayed financing. $525k all in with ARV of $650k changes things quite a bit...you can't pull all your cash back out, but getting $350k back may work...What is your possible appraised value as-is? 

We're trying to decide on what material to use to replace it.There's not great air flow to inside which is why we're considering moving away from carpet and something that may hold less moisture, easier to clean, look more modern etc.

Actually everything is smoothed back over with the tenant an @Nathan G. as you mentioned in another post prior to deeming uninhabitable someone at the city should decide that the water leaking in is in the garage and it is not excessive maybe things are not translating well over posting on the forum. 

But, if you are willing to do more significant rehabs, you can probably find ones with over $10K of equity capture and cash flow in excess of $400/mo. 

There's been a lot of rain and moisture coming in from where the 2 basement window openings are.

I noticed there are multiple doors that do not close properly without jamming including the front door which hopefully is not due to foundation shifting, our contractor said its more than likely just a build up of moisture filling up inside and all the wood expanding and warping.