Your estimate seems low, but even at that cost, it will not add that value.  

Hey All, I’ve found an off market duplex in need of some repair (estimate unknown as I haven’t been inside yet).

Through this journey, I’ve built strong relationships and developed valuable expertise in:Researching micromarkets and identifying comparables, potencial Accurately estimating construction or remodeling costs.Securing fast and reliable financing through partnerships with two top hard money lenders in Texas, offering competitive rates.I’m on this platform to connect with capital partners who are seeking an annual ROI of 12%-15%.

Basis - $323K Debt $66K Liquidation Cost estimate 10% if he sells through broker - $66K. 

Price out as much as you can in terms of materials and estimates.

My initial reaction was "hell no".Algorithms are usually poor estimators of actual value.  

It has provided no estimate of when distributions will be resumed.Nonetheless, it continues its barrage of self-promotion and continues to project large profits on current offerings.The proof is in the pudding.

Is there any good rules of thumb to estimating the cost of a boiler?

We have been working to be extremely conservative with our estimates but with this being our first go at this, any additional expertise is greatly appreciated! 

My home has an estimated $100,000 or more in equity in it.