@Brandon C. , how is it going with your VA? I followed the same trajectory you did - Pat Live for a year (wasted too many minutes), then a VA for a couple of years (calls fell through the cracks). Now I sent 4-6k mailers a month, get a .5 to 1.25% response rate, and can still answer my own phone most of the time.
I can only speak for myself, but I strongly believe it's in your best interest to answer as many of the sellers' calls as you possibly can, for several reasons.
The first is that you will never have a better chance to hone your negotiating skills and develop your phone "personality" than you will when answering seller calls. The education you will receive is priceless, and the more you do it the faster you'll get good at it.
The second is that it's tough to overestimate the importance of that first customer contact. Prospective sellers are probably getting mailers from lots of investors. What will mean more to the caller - a fully engaged business owner listening and asking specific targeted questions? Or someone using a script, taking down information and promising a call back from the decision maker? Put another way - if you were the caller, who would you rather talk to?
Now if you are working a full-time day job and can't answer that's one thing, and maybe you have an excellent VA who treats those calls like it's her own wholesale fee on the line. Either way please make sure you're giving your prospects the very best customer experience the first time they call and answer the phone as much as you can, for your benefit as well as theirs.