You should also have a conversation with your tax accountant about your bank account setup. 

things missing in your list (everyone manages differently, so take it with a grain of salt)Vacancy rateTurn overbad debt legal fees (evictions as needed)accounting fees for professional tax prepmaintenanceProperty TaxesSales Tax on PM fees (In NM, this is charged, not sure about where you are)Reserves for replacement CAPEX - furnace, water heaters, ac, roof, parking lot, etc.Admin, software, advertising, etc.Cost segregation study for accelerated depreciation captureAs for your loan. 

Prepaid items are comprised of property taxes and insurance and prepaid interest.Property taxes and homeowners’ insurance will depend on whether or not you have an escrow account, when you are closing, and when those items are due.

Based on the value of a property you can likely get away with a inexpensive desk top study such as condos and you will require a more comprehensive engineering study for larger properties like a 4plex.Desktop / modeling options are sometimes good for smaller residential like you mention. 

This year is the first year I will qualify as a real estate professional and be able to take some aggressive deductions through things like cost segregation studies.

Does it go down like a traditional mortgage (funds requested at closing, checks written, etc), or do they hand over the funds to your account beforehand so you can put the money up as if it is cash?

Once you have a short list, get an account with each one and run them through the wringer to see how they really function.

I was planning on reaching out to them but that’s a good pointer to take into account. 

Pick up as many as you can and study their rates vs. their occupancy rate.

I'm also considering Legal Zoom for the LLC portion -- and I understand they may also be able to assist with the operating agreement.I'd also welcome any recommendations on accountants too.