Actually do a lease and charge, collect, and report market rent. 

Any advice on if a lease option is the way to go or should I walk away.

Plan to move out and rent unit C in 1-2 years.Mortgage: $183,000down payment: $6,405Mortgage payment with insurance, and taxes: $1450property taxes: $3,060yrhome owners insurance:  $1,740yrUnit A singe bedroom: $850 leased until 9/2018Unit B single bedroom: $800 leased until 6/2018Unit C three bedroom: currently leased at $1100 until 1/2018 but I will be moving into that unit.Landlord pays for heat in all units - seller said it is roughly $500 a month.tenants pay electric.Using the bigger pockets calculator I see that while I'm living there it should cover the mortgage / I may have to pay small amount.

As a Real Estate professional you should know about:  Lease with Option to Buy, Contract for Deed, Rent to Own. 

Hi, I just leased to a new tenant (six-month lease) and the tenant has moved into the premises this month.

The house was built in the 1930's about the same timeline as the previous house I just rehabbed and rented (Pushed about 40K of equity depending on the appraisal, and only spent about 13K for the rehab) the ARV on the new triplex is about $230k with about $10-15k, all together worth of rehab work as each tenants leases come up, and I'm talking basic interior paint, some vinyl floors throughout except bathroom, and any nick-nacks throughout the units, not a full scale rehab as I did before. 

The other 3 are long term leases and the 4th is a furnished STR that I have been seasoning since March.

My initial thought was to set up a master lease option until the mortgage is paid but 15 years seems excessive.

As a leasing consultant for a property management company, I usually see tenants pay all utilities. 

Have you considered getting a job with a developer maybe starting on the leasing side of a new construction building and get an understanding for that side of the business and see if there are future opportunities in the property management then development side?