It sounds like at this time it is producing well for you. 

Hoping that each of them produce $1500 in rent, I’d like to get $3,000 total which would be enough to cover my mortgage. 

Any brokerage can be the right fit for you so long as you commit to taking initiative and putting in the work.By 'work', I mean income-producing activities (lead generation and follow-up) i.e. cold calling, door-knocking, contacting your sphere of influence, networking, hosting open houses, running online advertising, marketing (paper or online), or anything else that will get you in front of prospective clients.My first broker rarely answered my phone calls and by the time she responded, I'd often already have the answer I was looking for.

I've heard it first-hand.A mortgage person that understands income producing properties applies 75% of the rent towards your income.

The investors who were totally ( or at least MOSTLY) honest in all their dealings ending up with real estate produced net worth $3 million or more.I don’t know why this is, but I’ve seen it time and time again. 

I nice, income producing apartment complex Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

I've found that the best areas for the investors I have worked with on BRRRR properties are areas like Center Point, Fultondale, Gardendale, and Pinson areas.These areas are solid and aren't in warzones like Fairfield or Tarrant but will also produce you cash flow and equity unlike cities like Hoover or Vestavia.

Join a high producing team.

We consistently produce over $70k in net income and I distribute this to support my family.Long-Distance REI: I am looking to invest in long-distance cash-flowing SFH in growing C-Class neighborhoods.

Produce month cash flow.