Or if you just mean you don't want to go the conventional route anymore because of how slow and strict they are there are lenders out there that only work with real estate investors. 

Not sure about local code but I would imagine they needed town and/or utility's permission to do the install and maybe validate any credits/rebates, so I missed...7) see if local utility or town have a record in their old permits, then call installer.good luck.

Is there any way that you can reach out to the agency and tell them what you need to do which is to put the unit up to code?

Systems which use prepaid cards or member cards/codes are better for the landlord (less incentive for theft), but are even more costly - unless your building is sufficiently large, the costs may not be justified.  

BUT, you may need a bigger beam according to local codes.

When you renovate, You need to bring upto today’s code( firewall, fire sprinklers, electric, plumbing, insulation...)With all the above, check the renovation cost, it becomes kind of new construction.Let me know if need more details Thanks Reddy

Prefferably id like to connect with some of you for further questions.Im looking for single family housing and id like facts and statistics that are current and related to those. or atleast pointed in the right direction.Please and thanksHere is something to get you started.http://www.city-data.com/zips/...Zip code 43609 compared to state average:100% urban population.Estimated median house/condo value in 2017: $53,07943609:$53,079Ohio:$144,200According to our research of Ohio and other state lists, there were 90 registered sex offenders living in 43609 zip code as of March 01, 2020.

Specifically in the 92104 zip code.

I guess having looked at this...I had already formed the opinion that it's not 100% the best business move when you look strictly at the math.

@Derek Larson I would recommend setting strict screening criteria for potential rental applicants.