Think hard about the specific risks your buyer(s) have in dealing with you, build your sales pitch to portray strengths that align with their risks, there are multiple good suggestions in this thread. You sales story can then address these up front and most buyers will take these and move onto other topics looking for weaknesses in your offer.
Also have your risk mitigations ready for use if needed, Things like exiting relationships with sub contractors for more resources, availability of additional funding if required. An instant solid response when an objection is raised may deal with it on the spot.

Philipp Karbaum's comments are all valid.
A key point to add is that if you look at small vehicle rental businesses their stock is based on asset finance not investment. Here they key is contacts in the asset finance businesses, they are covering their risk with ownership of the asset which your business is leasing. You are also likely to be covering the residual risk so some knowledge in this area is vital. If you ask people who have started rental businesses they will tell you that the hardest, most time consuming and stressful are is the financing of assets.