There are only two ways in which my portfolio can grow without leverage - the first is to inject it with fresh capital, and the second is to grow it organically from dividends/capital appreciation. To grow it by injecting fresh capital, it will have to come from savings. And where do savings come from? From work. After subtracting all the necessary deductions, I'm left with 30k to inject into my warchest every year. When my portfolio is small, say about 100k, this addition of 30k per year into my portfolio will increase it by 30%, which is way more than what I think I can grow my portfolio organically. As my portfolio grows bigger in size, there will come a time when the addition of 30k per year will not be significant. 500k portfolio with 30k injection is 6% while a 800k portfolio with 30k injection is just 3.75%......