Dionigi,
On a practical level, while you may well be able to afford the purchase with respect to cash flow, 7-8% of net worth is too high for my taste. Emergency needs arise, tuitions inflate faster than everything else, and disability insurance is never high enough.
On an emotional level, , you might consider whether fulfillment of a "lifelong dream" in your 30s would prove a hard act to follow in your 40s, 50s, 60s, and beyond. Why not savor this particular expectation a bit longer? Lifetime achievement awards are best received after a lifetime of achievement.
Park