There is a company names Hemlane that offers that "light PM" service that may be interesting for you instead of a full blow PM company that may cost 7-10% of revenues.

Any investor or developer buy raw land lot (zoning code G) and go through the process with the city to convert to commercial use?

Work out a fair revenue-sharing model, such as a flat lease or percentage of profits, and consider hiring a property manager for oversight.This post does not create a CPA-Client relationship.

If you don't mind a little more management, renting by the room and midterm can bring in a lot more revenue than renting just the basement or other unit if you get a duplex. 

I am a 23 year old who recently graduated from college with a business degree focusing on real estate finance and development.

Typically, if they can make it work as an STR they go that route because it almost always generates the most revenue.

Definitely focusing on offmarket or even on market multifamily homes (minimum 4 units). started off in real estate development last 2 years but the paydays are brutal building then waiting to sell.So now looking to switch up strategies to purchase cashflowing properties and then get back to ground up construction or even possible fix and flips. 

By consolidating and repurposing these spaces, property owners can unlock additional revenue streams.Upgrading Amenities.

Hands down other than major developers hedge funds and big time syndicators the biggest money in real estate today is the successful Guru trainer etc.. 

U have to find developments that are purpose built for investors..