We could draft 3 starters, that part isn't impossible. It's just that at least two of the starters would probably be from cheaper positions.
For instance, if we were to trade down and pick up an extra 3rd round pick... we could draft one of the RBs or a Safety-- both positions go cheaply and both are on our list.
What we are unlikely to manage is getting 2 starting Offensive Lineman and an Edge.
So... it isn't just the number, it is the positional value.
Most touts have 3 centers ranked above the rest... in some cases, way above the rest.
Grabbing one of these three seems very doable in rounds one or two. Getting a RB, Safety, or WSLB is possible...
Now we have to figure out how to get another offensive or defensive lineman.
I won't say it's impossible.