Can I afford this house?

I feel weird going to Reddit for this but screw it. The house is at $359k asking, I think I can get it somewhere between $340k-$350k. With taxes and insurance that puts my mortgage about $2700 per month at 20 years with $75k down including equity from my current home leaving me with an additional $30k in the bank for closing and commission costs. Commission should be low since we already have a buyer for our current home lined up. I have a seasonal job working appx 6 months out of the year away from home with an income of appx 140k Annual. Monthly income varies from $0 to $12k. My wife brings in another $20k-$30k annually. I have have about $1500 in debt payments per month. Thoughts?