I am planning on installing water submeter on my apartment units.

Your rental dwelling policy will cover if you have water damage coverage.

Is there sufficient water to handle the increase and how much could I get for rents?"

., remove debris, add city water, change zoning?

To counteract it is best to sharpen your pencil and identify cost savings opportunities and ways to run rehab more efficiently 

Quote from @Steve Eason: We're developing on 1–2-acre rural parcels with energy-efficient SIP homes and steel-frame barndominiums, all designed to include ADUs (either attached or as flex additions).

I spoke to an AC company and the unit is 20 years old, works but not as efficient, so decided to change to a brand new system for over $8000 (pre COVID it's $3600 ouch). 

Definitely worth checking out if you're looking for something efficient and supportive! 

Quote from @DARIUS SMALLWOOD: Does anyone have an idea of how I can analyze multi family property more efficiently and effectively, any and all responses will help thank you Use the BP calculator

I am looking to connect with investors (one or several) who want to finance projects while I take care of everything from A to Z: Market research and property acquisitionPlanning and managing all renovationsResale and distribution of profits  Investment profiles are very attractive because my goal is always to start and complete projects efficiently so the invested capital is recovered as quickly as possible, with a strong potential for profit.