Small Device Repair Business Advice?
I'm interested in repairing small devices such as iPhones, Roombas, and Blackberries as a business. I think the market may exist in my locality (the Washington, DC area.) I have fairly good electronic lab facilities.
I don't have much experience doing this work, and I can use advice from others who have been there and done that concerning: how much inventory to keep, access to technical manuals, test equipment and tools that I might need, techniques for dealing with customers who are in a rush (especially with cell phones.)
I hold a day job that I depend on very much and I'm not quite willing to quit that for at least several years yet. I think my eyes are on getting needed experience and slowly building up business for my post-retirement years.
Advice, suggestions, books I ought to look at are all appreciated.