This did a lot of things: I increased my cash flow $300, that is a full extra payment a year, made book keeping easier because it a dollar/ dollar credit, and my people love me because we are able to get them financed at zero percent because they had such a great application. 

I am a bookkeeper who has many years experience of working with clients with properties. 

Right now I'm using QuickBooks for the book keeping, and a simple file structure that looks like this:Property namePurchase docs PicturesTenant leasesPaper trailYear 1 (e.g. 2015)InsuranceMortgage StatementsOwner StatementsProperty TaxesHOAYear 2 (e.g. 2016)I also have been using Excel to keep track of the occupancy status of properties and vacancy.  

A bookkeeper might get $15.00 an hour on a salary, you need to profit after taxes over that including employee expenses to be profitable.Most in RE are usually buying a job, see if your "earnings" are on par with similar job functions, you may be under paid!

Payroll, bookkeeping, etc can mostly be done remotely.Here is a great list of questions to ask a potential accountant:http://www.biggerpockets.com/forums/51/topics/70447-questions-to-ask-a-cpaAlso check out the www.NAEA.org page in your search.

What have you been paying, for what services; personal return, corporate return, bookkeeping, tax advice, segregated capital calculations, etc.I have been using a firm for corperate and personal returns.

My think tank in smart living company name Forward Investments: is my internal group; no lets use you: Real Estate Investment office for example: accountant, bookkeeper, researcher, negotiator.

I can also see us hiring a PT bookkeeper, a FT rehab manager and eventually a FT acquisitions manager (but I just have too much fun doing that now I hate to give it up yet :) ).So to answer that questions, a comfortable goal would be to have 250 units in 3 years, a lofty goal would be to have 400 units.  

All the details of rent collection, leasing, maintenance, repairs and bookkeeping are handled by national class, professional property managers.

Also, if you are going to be consistent in the flipping you also might want to consider a professional bookkeeping service as well to assure tight paperwork being presented to your CPA Advisor.