Is wholesaling commercial property in 45 Due Diligence realistic?

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I have seen many youtube videos regarding wholesaling commercial property within the 45 day due diligence period usually vacant NNN possibilities. Question to brokers/agents? Do most brokers accept wholesale offers from investors? Do brokers accept letters of intent? Is earnest money always required on purchase contracts? And most importantly, in your experience, does national tenants move that swiftly within the seller's 45 day due diligence period and offer their LOI to lease the property since they must do their due diligence as well? I would love to get as much feedback from the experts as possible to form a realistic strategy going forward.