PLUMBING — SUPPLY LINESRemove all accessible galvanized supply lines in basementInstall PEX trunk and branch system to each unitNew main shutoff and individual unit shutoffs (label by unit)Proper supports, labeling, and pressure testNo in-wall work unless absolutely necessaryPLUMBING — DRAINSReplace all horizontal cast-iron drain lines in basement with PVCReplace only visibly failed vertical sectionsAdd minimum one accessible cleanoutCheck all vent stacks in atticInsulate exposed vent stacks as neededTie into existing stack and sewer lateralELECTRICALRemove abandoned/exposed knob & tube in basement and attic onlySecure open junction boxes, cap unused wiresPanel tighten, label, safety checkReplace unsafe breakers if found (no panel replacement unless quoted separately)Install basic LED pull-chain or strip lighting in basement common areasWATER MANAGEMENTSeal visible foundation penetrations and cracks (interior)Improve grading where soil slopes toward foundationAdd/extend downspouts to discharge away from structureI suggest doing a renovation of the units individually to achieve the targeted monthly cash flow and appreciation. 

It's basically the loan amount compared to how much the property is worth.

At some point, the biggest learning jump comes from underwriting real deals and talking to lenders, agents, and property managers.For a duplex or triplex house hack, I’d focus less on “financial freedom” narratives and more on execution basics: conservative underwriting, realistic rehab/maintenance assumptions, and making sure the numbers work even if things don’t go perfectly.The goal of the first deal isn’t optimization, it’s getting through one full cycle cleanly so you can repeat it with confidence.Best of luck!

that's basically all on you. 

For screening, run your own credit/background (SmartMove or RentSpree), verify employment or a corporate letter, and collect first month plus deposit up front since 30+ days is basically a tenant in Ohio.

Do this for your 20s then from your 30's on you can basically spend money on whatever you want since your investments/business will make more than you can realistically spend if you do it right.

If there are a limited number of STR licenses available there, and you have one, and it transfers to the buyer, then you may be able to fetch a bit more as you are basically selling a business and a house together so to speak.

Besides some basic book keeping, or structure organization ., what advice from your CPA added value?

Classifieds posts are basically unlimited for all users. 

Here in Phoenix, several very close friends who shared details with me went BK because tenants basically stopped paying and they had leveraged all the properties.