Looking to lure patients away from their competitors, both Capital Health and University Medical Center of Princeton have gone all in, building two new facilities that resemble not so much hospitals as glittering resorts with a combined cost of nearly $1 billion. But with big gambles to net larger shares of the patient market come big risks, local healthcare analysts said. And growing pains can be expected as hospitals build big and take on huge new construction costs, especially in a region with no shortage of hospitals and healthcare options. Capital Health became the first to hit a potential stumbling block last week.