yes create the addendum but realize the tenant who has been paying could ask to be reimbursed for these costs as well as not accept the addendum.

Quote from @Daniel Gould: So it appears to me that while there's a free plan available to anyone in Invelo but the BP Pro membership includes access to the "Starter" Plan which currently costs $41/month otherwise - so this is a notable "value add" to the BP Pro Plan.

Hre are the key things to knowWhat you are bidding on - often oddball properties that are hard to identify and have little value are auctioned offThe true as is value of the property, The tax assessment can be way higher or way lower than the true as is valueThe local laws and how they affet your total costs and returns

One of my connections will fund the rehab for less and give it all to us on the upfront to finish the project at a lower cost.

So, it would then potentially cost you a penalty for early withdrawl and also income tax owed on it.

But once they give it to you, you inherit their cost basis and have a taxable gain.

Going this route is more involved and that makes it more costly too.

My questions is about opportunity cost.

Sewer line backup, ordinance & law, and replacement cost coverage are coverages I include. 

But from a moral & ethical perspective, you may want to decide at some point to just eat it and accept write it off as cost of doing business.