Lease
- much quicker to get the plane
- if you make a overall profit (ie. your DOC * 24 > your gates, salary, fuel for that plane), the plane pays for itself
- high fixed costs = high operation leverage = high risk = potentially high return
Buy
- you need the cash to purchase, or at the very least 50% of the plane for downpayment of a request, and the remaining at time of delivery
- your fixed costs would be much lower since you do not need to pay the lease
- you don't need as high a DOC to be profitable
Now, profit and return on investment are two totally different concepts. Lease maximize ROI while purchase maximize profit. It is your decision which one you choose.