OP - you seem to be following Glenn on this and ignoring other appraiser's advice, including George Hatch and Sputnam, both CG appraisers. Glenn is also a good appraiser and I agree with a number o of his appraisal posts, but not on this topic.
Just because it is a client VA liquidation assignment, does not eliminate a HBU analysis. It is still a market value appraisal, whether market value, or liquidation value ( LV is still a form of MV). If the appraisal form says purpose: market value, then you appraise for MV.
Glenn above invented a "higher and better use". Then he refers to a future HBU. Neither is correct for MV purpose analysis. Assuming a current eff date, dHBU is the current use. ( which can include consideration of future benefits or future zoning changes or plans for the property ). Does the structure , today's current date, add more value to the land then if torn down? Does it cost more to repair the structure than it would to tear down and raze the lot ? The OP never even poses that question. In a poor condition property, that is question number one.
Assuming the structure adds more value to the lot then removing it, even though needs repair,what is the HBU ? It could be SFR or Duplex. Either way, the poor condition would make the typical buyer an investor/flipper who pays less. GH advised how to determine the HBU per what comps are selling for . If no Duplex comps in the area are found going back 3 years, that is the market speaking that though zoning allows both, it was more profitable and on trend for SFR since that is the dominant sales trend.
AS IS condition for VA liquidation of loan use does not mean we skip the HBU of the property. They are two different analysis of the appraisal. HBU is the first fundamental analysis
AFter HBU is determined we go on to appraise what is subject worth in its current poor condition needing repairs.
Here is a sample of possible HBU analysis and commentary :
The subject is a Z sf structure in poor condition but it is salvagable for habitation with repairs . A HBU analysis sees the structure adding more value to the land then removing it, therefor HBU is existing use. The zoning allows either SFR or MF. The subject was at one time configured as a rental property with one unit up and one unit down. After researching past and recent sales, talking to RE agents and reviewing rents of both SFR and MF, the dominant trend shows support for conclusion of SFR as the HBU, though an outlier buyer might purchase it for MF.
The subject in poor condition would appeal to a typically motivated investor flipper buyer who pay in the lower price range due to extensive repair costs and motivation of making a profit above cost when they sell. Therefore, the comps are in poor or fair condition. Two of the comps were REO sales that were sold on MLS and exposed to the open market. They were used not because they were REO , but because they had the most similar poor condition to the subject. "