Is the cost of living in Mexico high?

"I live in San Miguel de Allende and this is a tourist and expat destination with a dollar economy. Supermarket and utility prices are on par with the rest of Mexico but rents, wages for staff and service providers are high. A meal in a mid market restaurant will cost $US100 for 2 without going overboard and nearer US200 if you go for expensive cocktails, brandy or tequila. Rents var enormously depending upon location so you can find a 3 bed house in a so so area for US$450 but in a better area will be $900-1200 and in the historic center the sky the limit. Medical costs - a consultation with a general doctor or specialist US$40-50, blood/urine analysis US$100. Excellent medical services but if you need hospitalisation, long term cancer treatment etc you need to budget US$1m+ say for 5 years of chemo, radio, surgery and end of life care. Although private medical care is far less expensive than in developed countries it soon adds up and for me at age 68 in pretty good health, medical expenses insurance premiums and pay as you go represent 30% of my monthly expenditure. For young families you must budget for private education and medical/dental care," wrote a member who made the move to Mexico.