Sounds like you’ve made a sound decision. You said PITI is equivalent to rent, but you’re getting a nicer house and it has solar. So, as a home, it’s costing you less to rent than own. Not to mention the tax deduction as well as paying down the mortgage. So, although you’d miss out on the interest you’d make from investment of the 20% down, you’d make it up by appreciation of the house as well as pay down of the principal. So, after 30 years, your cost of living will reduce dramatically.