Those car notes have to hurt. how long before you pay both or one of them off to knock it down by half?
I looked at buying a house this way. How much could one of you afford on your one job alone if the other one didn"t work? That"s how much you can afford.
Then that second job goes towards entertainment, vacations, home upgrades, childrens educations, retirement, and everything else. Just imagine $40,000 a year more then you actually need as a family to survive. You will be very seriously living nice lifestyle and if one of you loses your job you know you can cut back and survive indefinitely without having to worry about losing your house.
Edit: Because of your car payment Here"s what I"d assumed would be a good amount for you. $115,000/ 2(uncombined salary) = $57,500
$57,500/52(weeks)=$1105
$1105*2(half your total monthly income of one person)=$2210
So $2210 is how much you can afford before expenses at absolute maximum. Minus the $1,200 or so in expenses you mentioned that leaves you $1,010 a month for a house payment.
That"s probably way beyond safe but hey it almost guarantees you pay off your home early and keep up a lavish lifestyle.