IME There is a difference between "cutting corners" and making financially wise equipment purchases for your business. Can you get by with a small sensor entry level camera or do you really want to spring for a full frame DSLR and tilt/shift lenses. Cutting corners is putting short term profits over long term quality. The fact that your clients haven't complained about the images you are producing with an entry level camera doesn't mean much IMO. Its not where you are now but where do you want to go? Local realtors pay allot less than top architects for AP. Top architects are far more demanding in terms of vision and quality than local realtors. Where are you now vs. where do you want to be in 5 years? Getting by with acceptable quality or at the top of your field? If you want to be at the top of your field you want to begin producing images NOW that will impress the clients where you want to be in 5 years both in terms of vision and image quality. Your standards must exceed your clients. Then you don't have to worry about whether your images are "good enough".
And then what about a top of the line medium format camera like the Arca I mention in an earlier post? That Arca with a 45MP back and a couple of lenses can run.......what 50K? Is it overkill?