With just one property, bookkeeping and collecting rent is simple since you could just use one of the main payment platforms like Paypal, Venmo, Zelle etc to collect rent without hitting limits -- I believe many investors are still at this level.

I would need a bookkeeper do approximately 2 hours worth of Journal entries for some imporovements and need them done according to the instructions from your C.P.A

Yes I think you understand it correctly.You might benefit outsourcing to a bookkeeper. 

Since the owner had no real bookkeeping on the property, we did owner financing.  

We are upgrading our services to have them take over our accounting and book keeping as well.

I don't use NNN leases for residential as the bookkeeping is too consuming but it might violate areas of landlord tenant laws which has it's own peculiarities.

I'm looking to switch over to Widget Bookkeeping and Tax.  

And then there's the issues of property tax, park repair and maintenance, bookkeeping, and about 20 other cost categories.I've been doing this for 25 years and I can guarantee you the expense ratio will be 50% best case on this deal as you have described it.

Use Excel, Stessa, Quickbooks, old fashioned ledger, whatever to do your bookkeeping. 

Many on here will charge a flat rate, not an hourly rate, throughout the year that includes the tax return, monthly/quarterly check-ins, bookkeeping, and ongoing email support.