The problem comes from an investor's conditioning to never pay contractors upfront, or they will not finish the job.

@Henry Clark put the commercial land up front for sale, fund some of the construction before it's even finished. 

roof replacement, all new floors, new finish plumbing, interior cosmetics, appliances, fixtures, and just knowing the area of town What was the outcome?

The area among several others is more than capable - the finish product is far more important once you’ve picked an area that’s proven to perform.I’ve bought 25+ for me and clients in the last 18 months and manage 15+.  

The goal is to finish the renovation by November and then rent the warehouse to tenants.

you are almost to the finish line!!

I bought it in 2022 for $155k and finished the rehab early 2023.The rehab was about 360K all in and appraised for $825K upon completion.

And return to investor apr was 23.3 % I made the rest. this deal start to finish was 88 days.. average though is closer o 120 to 140 of course. 

And we found a great pre-finished lumber supplier for the siding and the tongue and groove that is saving us 10 to 15k a cabin depending on the size (and producing far better quality results in the finishes).It doesn't sound like much when you're looking at 300k to 500k builds.  

However, new construction starts have plummeted since 2022/2023, so within the next 1-3 years current projects that were started in 2022 will finish up, but the pipeline of projects that started in 22/23 is way smaller so projects being completed in 2025-2028 will be significantly less so supply and demand should tip back (all else being equal).