I don't know any builders here, so I am wondering a few things: - Does anyone have a builder that would be interested in doing a single infill project (there is another infill lot going up on the street, might try and connect with them) - I am in between paying for it myself with cash during construction (maybe the home will cost 150-200k to build?)

Because we are financing most of it, when there are repairs, how would you factor those costs into our son's ownership?

My question is, does anyone have a negotiation equation or strategy to get the price down, considering these costly repairs.

Get replacement cost hazard insurance along with an umbrella policy of at least $1M, probably double in your area.

How much does it cost to buy down rate per %?

In my opinion, since the tax code is open to interpretation, I interpret as much of my costs as repairs unless something obviously falls into the definition of asset.

@Preet Oberoi Purchasing a short-term rental (STR) or tiny home to offset W-2 income with depreciation can be effective if structured correctly.

It's very common for buyers to get nervous about sewer line issues due to how costly the repairs can get.  

The biggest challenge is to find one to purchase at a reasonable cost. 

Repair costs would be $150k.