The basic acts of screening tenants, signing leases, paying the bills and receiving the rents are administrative in nature, and if in a modest amount would not likely be viewed as providing services. 

Here are the laws in regards to this stuff.4735.01 [Effective Until 3/20/2019] Real estate broker definitions.As used in this chapter:(A) "Real estate broker" includes any person, partnership, association, limited liability company, limited liability partnership, or corporation, foreign or domestic, who for another, whether pursuant to a power of attorney or otherwise, and who for a fee, commission, or other valuable consideration, or with the intention, or in the expectation, or upon the promise of receiving or collecting a fee, commission, or other valuable consideration does any of the following:(1) Sells, exchanges, purchases, rents, or leases, or negotiates the sale, exchange, purchase, rental, or leasing of any real estate;(2) Offers, attempts, or agrees to negotiate the sale, exchange, purchase, rental, or leasing of any real estate;(3) Lists, or offers, attempts, or agrees to list, or auctions, or offers, attempts, or agrees to auction, any real estate;(4) Buys or offers to buy, sells or offers to sell, or otherwise deals in options on real estate;(5) Operates, manages, or rents, or offers or attempts to operate, manage, or rent, other than as custodian, caretaker, or janitor, any building or portions of buildings to the public as tenants;(6) Advertises or holds self out as engaged in the business of selling, exchanging, purchasing, renting, or leasing real estate;(7) Directs or assists in the procuring of prospects or the negotiation of any transaction, other than mortgage financing, which does or is calculated to result in the sale, exchange, leasing, or renting of any real estate;(8) Is engaged in the business of charging an advance fee or contracting for collection of a fee in connection with any contract whereby the broker undertakes primarily to promote the sale, exchange, purchase, rental, or leasing of real estate through its listing in a publication issued primarily for such purpose, or for referral of information concerning such real estate to brokers, or both, except that this division does not apply to a publisher of listings or compilations of sales of real estate by their owners;(9) Collects rental information for purposes of referring prospective tenants to rental units or locations of such units and charges the prospective tenants a fee.

I cannot guarantee 750 hours a year, nor am I sure how it's "counted", if I find tenants, run repairs, do billing, etc does that count enough?

I have also seen LL with one meter bill tenants based on percentage - I guess I do that in one of mine too (3/1 house with 1/1 mother-in-law apartment: 3/1 pays 75% and I pay 1/1 25% and include internet for 3/1 if they cover 1/2 bill).

In return, be sure to give them your business, whenever you can.Ask the previous residents for copies of utility bills.

Listen to Podcast #301 - The Incredible Power of Long-Distance BRRRR Investing with Alex Felice. 

I'm a Student (living on the GI Bill and spousal income/hustling) with about $180,000 in equity in my primary residence (paid off in full).   

Originally posted by @Bill Hampton: Thank you.

You can leave the existing heating system and let each unit be responsible for their own hot water bills.

As a first timer, I have tons of questions on what to expect price wise, and how to do it especially since the property has central air so I have to separate the system into different zones for each apartment to have their own control and for billing purposes.