I do the math here: Building an E-team that makes up to $867,000 (check the math)
But with respect to loosening the budget - we actually have a Guaranteed ROI program that states if you do what we advise you to do consistently, and it does not pay for itself (including your SAAS fees, PPC fees AND management fees) we will give you your money back. (But you have to be willing to do the work and hold the agents accountable).
Each market is different (Depends on cost per lead) - in my market (high price point, high commission but higher CPL) I budget $1,000 per agent per month for PPC in less expensive markets you can go as low as $500 PPC budget per agent per month.
If you’re going to do it though, I would also recommend some cleanup of your site - there is quite a lot of low hanging fruit on there that would likely improve your conversion and overall consumer impression. We do have some extra design time available right now (if you can do it this month) - I’d happily offer you a smoking deal on it.