I think that for many of us there is a number past which we find it difficult to balance the care and enjoyment of our snakes with work, family, other hobbies/interests and other obligations. For me that number is about a dozen. Which is how many I have right now. I still enjoy my snakes as individuals, but have realized that for me, personally, if I were to double my collection it would be too many. Each person't "number" may be different, but many new herpers get caught up in the excitement and simply start "collecting" snakes...Only to wind up with a number that is unrealistic for them.
As for you other posts...Yes, $60/month is too much to be spending on 5 snakes. I spend about $50 every other month to feed 12 snakes...some of which are eating rats right now. It does help, of course, if you take a couple of months off in the winter.
As for not being able to afford another snake...Most of the snakes I have bought during the past couple of years have cost me less that $20 each. Yes, I am a bit of a bargain hunter. No, I don't require expensive, fancy morphs. It's all relative. ENjoy. Duffy