Beginning investor acquiring properties

[Brady Holt]

What is the fastest rate that a first time, part time, buy and hold cash flow investor should safely try to acquire rental properties to keep from getting in over their head? As fast as you can find good deals? 1 per month?; 1 every 3 months; 1 every 6 months? 1 per year? I recognize this is probably a very complex question and my ignorance is trying to simplify it. Any guidance or help in the rate one should try to intelligently build their portfolio is appreciated.