Pure client service.  

You pay the contractor for their services and then keep all of the profits. 

Securities and Investment Advisory Services offered through DFPG Investments, LLC.[1] Multnomah County Executive Rule No. 388, March 11, 2020[2]Marcus & Millichap, 2020 Multifamily North American Investment Forecast

Out here we call it the MLS, Multiple Listing Service.

It should be as easy as converting one conventional loan that cashflows well to a Debt Service Coverage Ratio loan or DSCR.

Quote from @Sean O'Keefe: This company is 3x the price of two well-known companies providing the same service and mentioned here:  https://www.biggerpockets.com/forums/51/topics/1136752-expla...Hopefully price isn’t the only consideration 🤔 For DIY, I'd say it's at the top of the list.

Key Steps Before ProceedingContact the Loan Servicer: They will guide you through the assumption process and confirm whether an entity can participate.Consult an Attorney: If you’re considering title transfers or joint ventures, an attorney familiar with VA loans can help you navigate potential risks.Understand Due-On-Sale Clauses: Ensure any post-assumption changes comply with the loan terms to avoid triggering repayment demands.Final ThoughtsVA loans are a unique and valuable financing tool, but the program’s focus on personal borrowers makes entity-based assumptions unlikely.

Hey @Shuvrajit Mukherjee - First off, I am not a developer, but just wanted to ask some clarifying questions to better understand what data you are searching for.It seems you want data from the Multiple Listing Service (MLS) not NAR?   

Nothing over any service you wanted to provide.Do property taxes fluctuate?

They charge $160 for photos.https://www.wowvideotours.com/services/