One con of the suburbs is that they also don't allow non-conforming dwelling units since they have City compliance inspections, while Chicago does not. 

(It will take another year or so before I can show a solid rental history on my first rental purchased last year; until then I won't qualify for another mortgage).I started construction on an accessory dwelling unit in my back yard, a carriage house (aka a large shed) that will become a not-so-tiny house.

Needs more information, but generally, in Baltimore City, a single-family dwelling located in a residential zoning district can only be converted to multi-family (2 or more units) in the R-7 through R-10 zoning districts.

Permits for one-family dwellings dropped 4.3% to a two-year low.

As a first time investor should i invest in a multifamily apartment complex or single dwelling home ? 

They treat residential as 1-4 family dwellings. 5 or 6 units?

It's generally assumed the line is 5-10%.A landlord must follow the requirements of the Eviction Law and cannot refuse to renew a lease without good cause (See Causes for Eviction), except in the case of owner-occupied two and three family dwellings, transient or seasonal tenantshttps://www.state.nj.us/dca/di...

Jay,   a "MASTER POLICY" will work for you, but remember you lose some coverage that you have with a "good" dwelling fire" policy. 

http://www.ci.minneapolis.mn.us/inspections/rental/inspections_rentlicensefee"When a dwelling is converted to rental property or has not had a license for the past 12 months, it must be inspected for compliance with the Housing Maintenance Code.

https://www.toledoblade.com/local/city/2022/11/25/amendments-lead-law-put-violators-housing-court/stories/20221125112City officials now want the Toledo Municipal Housing Court to hear alleged violations of Toledo’s lead-safety ordinance.The administration believes the change from an administrative hearing process will allow the law to withstand ongoing legal challenges that have prevented it from being enforced.Toledo has faced recurring legal challenges since 2016 while working to craft a law that requires owners of residential rentals with four or fewer dwellings and built before 1978 to inspect their properties for lead paint and obtain lead-safe certificates from the Toledo-Lucas County Health Department.The law also stipulates that inspections must be completed by a local lead inspector who visually inspects properties’ interiors and exteriors and collects dust wipes to test for compliance with U.S.