I hear ya dude !!! I found me self in much the same situation more than once .
At one point i was stressing about we don't have this or that , my wife quietly reminded me that we don't need ANYTHING , the bills are paid + , we both have good jobs that we enjoy , the kids are happy , smart , doing well in school , and going in a positive direction , we have land in 2 states that is paid for and incresing in value ( one property is on a Cool ass party river here in Arkansas, and the other is 40 acers of trees in Mississipi that we will cut , build us a house on befor mentioned river , and then replant ) .
Oh one thing to think about , i know you enjoy haveing the kiddos about but one day they will be grown and leave for their own journey thru life , and you and Jinx will have the pleasure of haveing the house all to your self , no more kids meals every nite , naked ninja attacks in the hallway
, etc......
Enjoy what you have , but rember this , it gets even better !!!