No experience with Good Sam. My credit union was the best I found. Beware, you can only borrow a % of the fair market value established by appraisal. I checked only on a loan for a used SMB and although the rates were good they wouldn't loan what I needed. Not sure how it works for a new SMB. I'd rather buy used and let someone else cover the initial depreciation. Have you thought of an equity line type loan. Easy to get usually. Interest is deductible. No hassels with appraisals etc.
2016 MBZ Sprinter 144" 4wd.
07 BMW 525xi wagon