Worries go down the drain.... (one of them)

I have a great neighbor!
Yesterday I spoke to my neighbor Sid, who lives in the home to the left of mine. Previously, we had discussed the problem I was having with driveway drainage. A few days ago, I told him about the costly quotes I received to run a new line to the back and asked him about the possibility of tapping into his drainage system. Today, Sid gave me the approval to tap into his drainage system.
HOORAY!

Sid's home has a fairly new drainage system that utilizes 2 - 4" pvc lines running to the back which then spill into 4 pvc outlets in his retaining wall. The drainage estimator told me that Sid's setup could handle a very large amount of water and that my driveway volume should have no impact on the system.

Of course, the basic premise of this agreement is that, if there is an impact on Sid's drainage, then I have to fall back to plan B - my own drainage system. But all indicators seem to point to this working out.

I already have a quote from the drainage guy to tap into Sid's system - $200. This is GREAT compared to the other quotes to run drainage to the back, which are all in the $1000 - $1500 range.