@Diana Jing @Ruchit Patel We appreciate the detailed insight. 

While it doesn't increase your search parameters, mdlandrec.net is a good free resource for when you want to find detailed information about a property such as mortgages, copies of deeds, etc.

Security deposit amountYou can find plenty of examples by searching for "tenant estoppel certificate doc" or exchanging "doc" with "pdf" for more options.Here is an example and explanation: Sample EstoppelSome have a lot of legal jargon but this document does not need to be so detailed.

Are their listings detailed with good-quality photos?

🎟️ Registration Details: Secure your spot early and take advantage of our early bird pricing. 

The property features two 1,400 sq ft suites on the main level (one currently leased) and over 3,000 sq ft on the upper level, with 750 sq ft already occupied, 3 small office spaces (+/- 250 sq ft each), and a basement tenant with 1,400 sq ft of storage space.The building generates $6,000 in monthly gross income from its five tenants, but with full occupancy and market-rate rents, it has the potential to bring in $10,000+ per month.Given its historical significance, stunning architectural details, and location, I’m curious about your opinion: Would this property be more marketable for sale with or without the current tenants?

Lawyer would be a great resource for thinking through this.This isn't enough information to comment on tax advantages/disadvantages of an investment partner - more detail is needed. 

Here's a bit more in detail about how rates are calculated for DSCR loans:1.

But, after scouring Amazon and BP, it seems that resources for practical, updated, and detailed information about raw land investment is hard to come by.

I understand that even modern multi-families may have main disconnects that are fused.