You're in Utah...so am I. Best way to find the information you need is to check in with two groups that are the best at Duodenal Switch in Utah. Rocky Mountain Associated Physicians holds regular bariatric seminars at St. Marks Hospital. The one I went to was conducted by Dr. Rodrick McKinlay. I have other co-morbidity issues (not CHF). Much of the session is open question and answer with an actual bariatric surgeon.
The other group that seems to have some really good information is BMI Institute of Utah (Dr. Cottam). What I appreciate about this group is that they can send you a "self-pay" price list for Duodenal Switch.
The average cost of a DS in Utah is between $22K to $25K. BMI has a partial outpatient DS that runs around $16K (if you have health insurance that won't pay for bariatric surgery).
I was sad to learn that SelectHealth doesn't often cover these surgeries.
I would highly recommend that you talk to both Dr. McKinlay and Dr. Cottam to get some advice on how they would handle working with someone who has CHF.
All the best,