Generally speaking, yes Commercial Mortgage Lenders are considered to be reliable. Some even have a triple-A rating. As, with all businesses though it's important to make sure the one you choose is of good reputation.
Commercial Mortgage lenders is very reliable. thousands abon thousand use them. They can do there job in a reasonible amount. I'd usggest using them but if your not comfortable don't.
Yes, commercial mortgage lenders can be found online. There are thousands of mortgage lenders and once you find a company, you can go to their website and get a quotation.
A commercial mortgage is not the same as a residential mortgage. A commercial mortgage applies to commercial buildings or businesses. Businesspeople take out commercial mortgages.
It really depends on the company you choose to go with. Check with local mortgage lenders to see what options are available to you and also check the online home-lenders to see how others have fared...